Rajca Research Group at UNL:Publications

Publications
Last updated: 10/21/2012

	112. Joseph T. Paletta, Maren Pink, Bridget Foley, Suchada Rajca, Andrzej Rajca , “Synthesis and Reduction Kinetics of Sterically Shielded Pyrrolidine Nitroxides”, Org. Lett., 2012, 14, 5322–5325. DOI:10.1021/ol302506f
	111. Andrzej Rajca, Ying Wang, Michael Boska, Joseph T. Paletta, Arnon Olankitwanit, Michael A. Swanson, Deborah G. Mitchell, Sandra S. Eaton, Gareth R. Eaton, Suchada Rajca,“Organic Radical Contrast Agents for Magnetic Resonance Imaging”, J. Am. Chem. Soc., 2012, 134, 15724–15727. DOI:10.1021/ja3079829, [JACS In C&EN]
	110. Makoto Miyasaka, Maren Pink, Arnon Olankitwanit, Suchada Rajca, Andrzej Rajca, “Band Gap of Carbon-Sulfur [n]Helicenes”, Org. Lett., 2012, 14, 3076–3079. DOI:10.1021/ol3011437. Highlighted in Synfacts: Timothy M. Swager, Gregory D. Gutierrez, Synfacts, 2012, 8 0964. DOI: 10.1055/s-0032-1317089
	109. Andrzej Rajca, Przemyslaw J. Boratynski, Arnon Olankitwanit, Kouichi Shiraishi, Maren Pink, Suchada Rajca , “Ladder Oligo(m-aniline)s: Derivatives of Azaacenes with Cross-Conjugated π-Systems”, J. Org. Chem., 2012, 77, 2107–2120 (Featured Article). DOI: 10.1021/jo2025948. Highlighted in Synfacts: Timothy M. Swager, John B. Goods, Synfacts, 2012, 8 0502. DOI: 10.1055/s-0031-1290840
	108. Andrzej Rajca, Kouichi Shiraishi, Przemyslaw J. Boratynski, Maren Pink, Makoto Miyasaka, Suchada Rajca, “Oxidation of Annelated Diarylamines: Analysis of Reaction Pathways to Nitroxide Diradical and Spirocyclic Products”, J. Org. Chem., 2011, 76, 8447–8457. DOI: 10.1021/jo2017923
	107. Arnon Olankitwanit, Velavan Kathirvelu, Suchada Rajca, Gareth R. Eaton, Sandra S. Eaton, Andrzej Rajca, “Calix[4]arene nitroxide tetraradical and octaradical”, Chem. Commun., 2011, 47, 6443–6445. DOI: 10.1039/C1CC11172H [From collection Supramolecular Chemistry]
	106. Andrzej Rajca, Arnon Olankitwanit, Suchada Rajca, “Triplet Ground State Derivative of Aza-m-Xylylene Diradical with Large Singlet-Triplet Energy Gap”, J. Am. Chem. Soc., 2011, 133, 4750–4753. DOI:10.1021/ja200708b
	105. Ying Wang, Suchada Rajca, Andrzej Rajca, “Bis(benzenesulfonyl) Sulfide” (2011), Encyclopedia of Reagents for Organic Synthesis [Online], John Wiley & Sons Ltd. DOI: 10.1002/047084289X.rn01351
	104. Przemyslaw J. Boratynski, Maren Pink, Suchada Rajca, Andrzej Rajca, “Isolation of the Triplet Ground State Aminyl Diradical”, Angew. Chem. Int. Ed., 2010, 49, 5459–5462. DOI:10.1002/anie.201002811
	103. Makoto Miyasaka, Maren Pink, Suchada Rajca, Andrzej Rajca, “Spiro Oligothiophenes”, Org. Lett., 2010, 12, 3230–3233. DOI:10.1021/ol1011696. Highlighted in Synfacts: Timothy M. Swager, Joel Batson, Synfacts, 2010, 1136-1136. DOI: 10.1055/s-0030-1258632
	102. Andrzej Rajca, Velavan Kathirvelu, Sandip K. Roy, Maren Pink, Suchada Rajca, Santanu Sarkar, Sandra S. Eaton, Gareth R. Eaton, “A Spirocyclohexyl Nitroxide Amino Acid Spin Label for Pulsed EPR Spectroscopy Distance Measurements”, Chem. Eur. J., 2010, 16, 5778–5782. DOI:10.1002/chem.200903102
	101. Jerzy K. Zak, Makoto Miyasaka, Suchada Rajca, Mieczyslaw Lapkowski, Andrzej Rajca, “Radical Cation of Helical, Cross-Conjugated β-Oligothiophene”, J. Am. Chem. Soc., 2010, 132, 3246–3247. DOI: 10.1021/ja910076n
	100. Andrzej Rajca, Suchada Rajca, “Asymmetric Synthesis of Chiral Tetraphenylenes”, Angew. Chem. Int. Ed., 2010, 49, 672–674. DOI: 10.1002/anie.200905421
	99. Andrzej Rajca, Makoto Miyasaka, Shuzhang Xiao, Przemyslaw J. Boratynski, Maren Pink, Suchada Rajca, “Intramolecular Cyclization of Thiophene-Based [7]Helicenes to Quasi-[8]Circulenes”, J. Org. Chem., 2009, 74, 9105–9111. DOI: 10.1021/jo902030u
	98. Andrzej Rajca, Makoto Miyasaka, Maren Pink, Shuzhang Xiao, Suchada Rajca, Kausik Das, Kristin Plessel, “Functionalized Thiophene-Based [7]Helicene: Chirooptical Properties versus Electron Delocalization”, J. Org. Chem., 2009, 74, 7504–7513. DOI: 10.1021/jo901769c
	97. Makoto Miyasaka, Maren Pink, Suchada Rajca,Andrzej Rajca, “Noncovalent Interactions in the Asymmetric Synthesis of Rigid, Conjugated Helical Structures”, Angew. Chem. Int. Ed., 2009, 48, 5954–5957. DOI: 10.1002/anie.200901349 [Download]
	96. Andrzej Rajca, Kouichi Shiraishi, Suchada Rajca, “Stable Diarylnitroxide Diradical with Triplet Ground State”, Chem. Commun., 2009, 4372–4374. DOI: 10.1039/b909741d
	95. Andrzej Rajca, Matthew Vale, Suchada Rajca, “Diarylnitroxide Diradicals: Low-Temperature Oxidation of Diarylamines to Nitroxides”, J. Am. Chem. Soc., 2008, 130, 9099–9105. DOI: 10.1021/ja8016335
	94. Shuzhang Xiao, Maren Pink, Hua Wang, Suchada Rajca, Andrzej Rajca, “Chiral Tetrathienylene: Synthesis and X-ray Structure” J. Sulfur Chem., 2008, 29, 425-432 (invited article in the special issue on Extreme Sulfur Chemistry) DOI: 10.1080/17415990802027263
	93. Hideo Sato, Velavan Kathirvelu, Gaëlle Spagnol, Suchada Rajca, Andrzej Rajca, Sandra S. Eaton, and Gareth R. Eaton “Impact of electron-electron spin interaction on electron spin relaxation of nitroxide diradicals and tetraradical in glassy solvents between 10 and 300 K” J. Phys. Chem. B, 2008, 112, 2818 -2828. DOI:10.1021/jp073600u
	92. Matthew Vale, Maren Pink, Suchada Rajca, Andrzej Rajca, “Synthesis, Structure, and Conformation of Aza[1_n]metacyclophanes”, J. Org. Chem. (Featured Article), 2008, 73, 27-35. DOI: 10.1021/jo702151n
	91. Andrzej Rajca, Sumit Mukherjee, Maren Pink, Suchada Rajca, Kausik Das, “1,3-Alternate Calix[4]arene Nitronyl Nitroxide Tetraradical and Diradical: Synthesis, X-ray Crystallography, Paramagnetic NMR Spectroscopy, EPR Spectroscopy, and Magnetic Studies” Tetrahedron (Symp.-in-Print, New Trends in Calixarene Chemistry), 2007, 63, 10731 - 10742. DOI: 10.1016/j.tet.2007.07.051 [Download]
	90. Andrzej Rajca, Masahiro Takahashi, Maren Pink, Gaëlle Spagnol, Suchada Rajca, “Conformationally-Constrained, Stable, Triplet Ground State (S = 1) Nitroxide Diradicals. Antiferromagnetic Chains of S = 1 Diradicals”, J. Am. Chem. Soc., 2007, 129, 10159 - 10170. DOI: 10.1021/ja0712017
	89. Andrzej Rajca, Suchada Rajca, Maren Pink, Makoto Miyasaka “Annelated, Chiral π-Conjugated Systems: Tetraphenylenes and Helical β-Oligothiophenes”, SynLett, 2007,1799 - 1822 (account, invited) DOI: 10.1055/s-2007-984538
	88 Andrzej Rajca, Kouichi Shiraishi, Maren Pink, Suchada Rajca, “Triplet (S = 1) Ground State Aminyl Diradical” J. Am. Chem. Soc., 2007, 129, 7232 - 7233. DOI:10.1021/ja071881d
	87. Gaëlle Spagnol, Andrzej Rajca, Suchada Rajca, “Efficient Synthesis of Tricyclic Benzobisoxazines by Silica Gel Catalysis”, J. Org. Chem., 2007, 72, 1867 - 1869. DOI:10.1021/jo062670e
	86. Reyes Malavé Osuna, Rocío Ponce Ortiz, Víctor Hernández, Juan Teodomiro López Navarrete, Makoto Miyasaka, Suchada Rajca, Andrzej Rajca, Rainer Glaser, “Helically Annelated and Cross-Conjugated β-Oligothiophenes: An FT-Raman Spectroscopic and Quantum Chemical DFT Study”, J. Phys. Chem. C., 2007, 111, 4854 - 4860. DOI:10.1021/jp0677344. [animation]
	85. Andrzej Rajca, Makoto Miyasaka, “Synthesis and Characterization of Novel Chiral Conjugated Materials”, In Functional Organic Materials – Syntheses and Strategies, T. J. J. Mueller, U. H. F. Bunz, Eds.; Wiley-VCH, 2007, Chapter 15, 5435–77 [Download]
	84. Andrzej Rajca, Sumit Mukherjee, Maren Pink, Suchada Rajca, “Exchange Coupling Mediated Through-Bonds and Through-Space in Conformationally-Constrained Polyradical Scaffolds: Calix[4]arene Nitroxide Tetraradicals and Diradical“, J. Am. Chem. Soc., 2006, 128, 13497–13507. DOI:10.1021/ja063567+ . [PubMed]
	83. Kausik Das, Maren Pink, Suchada Rajca, Andrzej Rajca, “Synthesis and Structure of Nucleoside with π-Conjugated Nitroxide Spin Label Forming a One-Dimensional Ferromagnetic Chain”, J. Am. Chem. Soc., 2006, 128, 5334-5335. DOI:10.1021/ja060846o
	82. Makoto Miyasaka, Andrzej Rajca, “Synthesis of Dithieno[2,3-b:3′,2′-d]thiophenes-Building Blocks for Cross-Conjugated β-Oligothiophenes”, J. Org. Chem., 2006, 71, 3264-3266. DOI:10.1021/jo060038f
	81. Makoto Miyasaka, Andrzej Rajca, Maren Pink, Suchada Rajca, “Cross-Conjugated Oligothiophenes Derived from The (C₂S)_n Helix: Asymmetric Synthesis and Structure of Carbon-Sulfur [11]Helicene”, J. Am. Chem. Soc., 2005, 127, 13806-13807. DOI:10.1021/ja55414c
	80. Gaëlle Spagnol, Kouichi Shiraishi, Suchada Rajca, Andrzej Rajca, “Triplet Ground State (S = 1) Pegylated Bis(aminoxyl) Diradical: Synthesis and the Effect of Water on Magnetic Properties”, Chem. Comm., 2005, 5047-5049. DOI:10.1039/B508094K
	79. Kouichi Shiraishi, Andrzej Rajca, Maren Pink, Suchada Rajca, “π-Conjugated Conjoined Double Helicene via a Sequence of Three Oxidative CC– and NN–Homocouplings”, J. Am. Chem. Soc, 2005, 127, 9312-9313. DOI:10.1021/ja51521v
	78. Andrzej Rajca, Kouichi Shiraishi, Matthew Vale, Hongxian Han, Suchada Rajca, “Stable Hydrocarbon Diradical, an Analogue of Trimethylenemethane”, J. Am. Chem. Soc, 2005, 127, 9014-9020 (Web Release Date: June 1, 2005), DOI:10.1021/ja052002v
	77. Eiji Fukuzaki, Naoki Takahashi, Shingo Imai, Hiroyuki Nishide, Andrzej Rajca, “Synthesis of Dendritic, Non-Kekulé-, and Nondisjoint-type Triphenylmethanes Terminated with Galvinoxyl Radicals”, Polymer, J., 2005, 37, 284. DOI:10.1295/polymj.37.284
	76. Andrzej Rajca, “The Physical Organic Chemistry of Very High-Spin Polyradicals”, Adv. Phys. Org. Chem., 2005, 40, 153-199.
	75. Andrzej Rajca, Makoto Miyasaka, Maren Pink, Hua Wang and Suchada Rajca, “Helically Annelated and Cross-Conjugated Oligothiophenes: Asymmetric Synthesis, Resolution, and Characterization of a Carbon-Sulfur [7]Helicene”, J. Am. Chem. Soc.,2004, 126, 15211-15222. DOI:10.1021/ja0462530
	74. Makoto Miyasaka, Maren Pink, Andrzej Rajca and Suchada Rajca, “Chiral Molecular Glass: Synthesis and Characterization of Enantiomerically Pure Thiophene-Based [7]Helicene”, Chem. Eur. J., 2004, 10, 6531-6539. DOI:10.1002/chem.200400635
	73. Andrzej Rajca, Jirawat Wongsriratanakula, Suchada Rajca, Ronald L. Cerny, “Organic Spin Clusters: Annelated Macrocyclic Polyarylmethyl Polyradicals and Polymer with Very High-Spin S = 6 - 18”, Chem. Eur. J. , 2004, 10, 3144-3157. (VIP) DOI: 10.1002/chem.200306036 [Cover Picture]
	72. Andrzej Rajca, Jirawat Wongsriratanakul, Suchada Rajca, “Organic Spin Clusters: Macrocyclic-Macrocyclic Polyarylmethyl Polyradicals with Very High-Spin S = 5 - 13”, J. Am. Chem. Soc., 2004, 126, 6608-6626. DOI:10.1021/ja031549b
	71. Suchada Rajca, Andrzej Rajca, Jirawat Wongsriratanakul, Paul Butler, Sungmin Choi, “Organic Spin Clusters. Dendritic-Macrocyclic Polyarylmethyl Polyradical with Very High-Spin of S = 10 and its Derivatives: Synthesis, Magnetic Studies, and Small Angle Neutron Scattering”, J. Am. Chem. Soc., 2004, 126, 6972-6986. DOI:10.1021/ja031548j
	70. Andrzej Rajca, “Organic Polyradical: Magnetic Nanoclusters”, in Encyclopedia of Nanoscience and Nanotechnology, H. S. Nalwa Ed., American Scientific Publishers, 2004, vol. 8 (Ne-P), 285-294.
	69. Makoto Miyasaka and Andrzej Rajca, “Synthesis of a Short Carbon-Sulfur Helicene: Pd-Catalyzed Cross-Coupling at the β-Positions of Thiophenes”, Synlett (Cluster Issue, invited) 2004.177-182. DOI:10.1055/s-2003-43335
	68. Andrzej Rajca, Maren Pink, Teerapat Rojsajjakul, Kan Lu, Hua Wang, and Suchada Rajca, “X-ray Crystallography and Magnetic Studies of a Stable Macrocyclic Tetranitroxide. Intramolecular Dimer of Nitroxides in a Constrained Geometry of the Upper Rim of Calix[4]arene”, J. Am. Chem. Soc., 2003, 125, 8534-8538. DOI:10.1021/ja034115p
	67. T.B. Friedman, X. Cao, A. Rajca, H. Wang L.A. Nafie, “Determination of Absolute Configuration in Molecules with hiral Axes by Vibrational Circular Dichroism: A C₂-Symmetric Annelated Heptathiophene and a D₂-Symmetric Dimer of 1,1’-Binapthyl”, J. Phys. Chem. A, 2003, 107, 7692-7696. DOI:10.1021/jp030307v
	66. Andrzej Rajca, “Magnetic Polymers”, in Encyclopedia of Polymer Science and Technology, 3 ^rd Ed, (J. I. Kroschwitz, Ed) Wiley, 2003, 6, 721 - 735 (Online Posing Date: October 15, 2002) DOI:10.1002/0471440264.pst433
	65. Andrzej Rajca, “From High-Spin Organic Molecules to Organic Polymers with Magnetic Ordering”, Chem. Eur. J., 2002, 8, 4834-4841 (Concept Article, invited). DOI:10.1002/1521-3765(20021104)8:21<4834::AID-CHEM4834>3.0.CO;2-E
	64. Roy Shenhar, Hua Wang, Roy E. Hoffman, Limor Frish, Liat Avram, Itamar Willner, Andrzej Rajca, and Mordecai Rabinovitz, “Self-Assembled, Helically Stacked Anionic Aggregates of 2,5,8,11-Tetra-tert-butylcycloocta[1,2,3,4-def;5,6,7,8-d′e′f′] bisbiphenylene, Stabilized by Electrostatic Interactions”, J. Am. Chem. Soc., 2002, 124, 4685-4692. DOI: 10.1021/ja012140u
	63. Roy Shenhar, Itamar Willner, Andrzej Rajca, Mordecai Rabinovitz, “Photoejection of Electrons from Cycloocta[1,2,3,4-def;5,6,7,8-d′e′f′]Bisbiphenylene Radical-Anion and Dianion Derivatives: Identification of a Light-Induced Disproportionation”, J. Phys. Chem. A, 2002, 106, 6206-6212. DOI:10.1021/jp014330x
	62. A. Rajca, “Organic Spin Clusters, Fractals, and Networks with Very High-Spin”, in Hyper-structured Molecules III, H. Sasabe, Ed., Taylor & Francis, London, 2002, Chapter 3, 46-60.
	61. A. Rajca, J. Wongsriratanakul, S. Rajca, " Magnetic Ordering in an Organic Polymer", Science, 2001, 294, 1503. [Introduction to the Magnetism and Materials special issue by I. S. Osborn, "The Attraction of Magnetism"
	60. A. Rajca, H. Wang, P. Bolshov, S. Rajca, “Greek Cross Dodecaphenylene: Sparteine-Mediated Asymmetric Synthesis of Chiral D₂-Symmetric π-Conjugated Tetra-o-phenylenes”, Tetrahedron, 2001, 57, 3725-3735 DOI:10.1016/S0040-4020(01)00241-1 [Download]
	59. A. Rajca, “Very High-Spin Organic Polymers”, Polymer News, 2001, 26, 43-47 (Feature Article).
	58. A. Rajca, H. Wang, V. Pawitranon, T. J. Brett, J. J. Stezowski, “Synthesis and Structure of Tetrathiophene with a Chiral 1,1′-Binaphthyl Kink”, Chem. Commun., 2001, 1060-061. DOI:10.1039/b007355p
	57. A. Rajca, S. Rajca, J. Wongsriratanakul, C. R. Ross, II, “4,6-Bis-(trifluoromethyl)-N, N′:-di-tert-butyl-1,3-phenylenebis(aminoxyl) and its Bis(trifluoroacetylacetonato)manganese(II) Complex: Synthesis, X-ray Crystallography, and Magnetism”, Polyhedron, 2001, 20, 1669-675. DOI:10.1016/S0277-5387(01)00671-4
	56. S. Rajca, A. Rajca, “Polyarylmethyl Polyradicals as Organic Spin Clusters”, J. Solid State Chem., 2001, 159, 460-465. DOI:10.1006/jssc.2001.9179
	55. A. Rajca, H. Wang, M. Pink, S. Rajca, “Annelated Heptathiophene: a Fragment of a Carbon-Sulfur Helix”, Angew. Chem. Int. Ed., 2000, 39, 4481. DOI:10.1002/1521-3773(20001215)39:24<4481::AID-ANIE4481>3.0.CO;2-G
	54. A. Rajca, A. Safronov, S. Rajca, J. Wongsriratanakul “D₂-Symmetric Dimer of 1,1′-Binaphthyl and Its Chiral π-Conjugated Carbodianion”, J. Am. Chem. Soc., 2000, 122, 3351-3357. DOI:10.1021/ja993286k
	53. R. E. Hoffman, R. Shenhar, I. Willner, H. E. Bronstein, L. Scott, A. Rajca, M. Rabinovitz, “Heteronuclear editing method for detecting NOE between chemically equivalent protrons: application to polycyclic aromatic hydrocarbons”, Magn. Reson. Chem. 2000, 38, 311-314. DOI:10.1002/%28SICI%291097-458X%28200004%2938%3A4%3C311%3A%3AAID-MRC641%3E3.3.CO%3B2-L
	52. A. Rajca, S. Rajca, J. Wongsriratanakul, “Singlet-Triplet Energy Gap in a Cyclophane-Based Diradical with Parallel Exchange Coupling Pathways”, Chem. Commun., 2000, 1021-1022. DOI:10.1039/b001273o

51. A. Rajca, S. Rajca, J. Wongsriratanakul, “Very High-Spin Organic Polymer: π-Conjugated Hydrocarbon Network with Average Spin of S ≥ 40”, J. Am. Chem. Soc., 1999, 121, 6308. DOI:10.1021/ja990881d
50. A. Rajca, K. Lu, S. Rajca, C. Ross, II, “Singlet-triplet bistability in a 1,3-phenylene-based bis(aminoxyl) diradical”, Chem. Commun, 1999, 1249. DOI:10.1039/a901906e
49. A. Rajca, S. Rajca, J. Wongsriratanakul, “Hydrocarbon Polymer Network with Very High-Spin Ground State, S = 15 - 48”, Polym. Prepr. ACS, PMSE, 1999, 189.
48. A. Rajca, “High-Spin Organic Polyradicals”, in Magnetic Properties of Organic Materials, P. Lathti, Ed.; Marcel Dekker, 1999, Chapter 17.

47. A. Rajca, J. Wongsriratanakul, S. Rajca, R. Cerny, “Dendritic-Macrocyclic Very-High-Spin Organic Polyradical with S = 10”, Angew. Chem. Int. Ed., 1998, 37, 1229. [Abstract]
46. A. Rajca, S. Rajca, “Alkyl-Substituted Schlenk Hydrocarbon Diradicals with Triplet and Singlet Ground States in Frozen Solutions”, J. Chem. Soc. Perkin 2, 1998, 1077. DOI:10.1039/a706374a

45. A. Rajca, A. Safronov, S. Rajca, R. Schoemaker, “Double Helical Octaphenylene”, Angew. Chem. Int. Ed., 1997, 36, 488. DOI:10.1002/anie.199704881
44. A. Rajca, S. Rajca, S. R. Desai, V. W. Day, “Peroxides of Sterically Hindered Derivatives of Schlenk Hydrocarbon Diradical”, J. Org. Chem., 1997, 62, 6524. DOI:10.1021/jo961879x
43. A. Rajca, “Assembling Triarylmethyls into Mesoscopic-Size Polyradicals: How to Maintain Strong Interactions Between Multiple Sites in a Single Molecule?”, in Modular Chemistry, J. Michl, Ed., Kluwer, 1997, p. 193.
42. A. Rajca, “High-Spin Organic Polyradicals as Simple Spin Clusters”, Proceedings from the International Conference on Molecule-Based Magnets, Aug. 1996, Osaka, Japan; Liq. Cryst. Mol. Cryst., 1997, 305, 567.
41. A. Rajca, K. Lu, S. Rajca, “High-Spin Polyarylmethyl Polyradical: Fragment of a Macrocyclic Double-Strand”, J. Am. Chem. Soc., 1997, 119, 10335. DOI:10.1021/ja971493j
40. A. Rajca, J. Wongsriratanakul, S. Rajca, “High-Spin Organic Polyradicals as Spin Clusters: Ferromagnetic Spin Coupling through Biphenyl Unit in Polyarylmethyl Tri-, Penta-, Hepta-, and Hexadecaradicals”, J. Am. Chem. Soc., 1997, 119, 11674. DOI:10.1021/ja972378b

39. A. Rajca, “High-Spin Organic Polyradicals”, Polymer News, 1996, 21, 405 (Feature Article).
38. S. Rajca, S. and A. Rajca, “Dendritic Polyradicals” in Polymeric Materials Encyclopedia, J.C. Salamone, Ed., CRC Press: Boca Raton, FL, 1996, vol. 3 (D - E), 830.
37. A. Rajca, A. Safronov, S. Rajca, C. R. Ross, J. J. Stezowski, “Biphenylene Dimer. Molecular Fragment of a Two-Dimensional Carbon Net and Double-Stranded Polymer”, J. Am. Chem. Soc., 1996, 118, 7272. DOI:10.1021/ja961065y
36. A. Rajca, and S. Rajca, “Intramolecular Antiferromagnetic vs Ferromagnetic Spin Coupling Through the Biphenyl Unit”, J. Am. Chem. Soc., 1996, 118, 8121. DOI:10.1021/ja961045w
35. A. Rajca, “Very-High-Spin Polyradicals”, a chapter in ACS Symposium Series 644, Molecule-Based Magnetic Materials, M. M. Turnbull, T. Sugimoto, L. K. Thompson, Eds.; ACS, Washington, 1996, Chapter 17.

34. A. Rajca, S. Rajca, S. R. Desai, “Macrocyclic π-Conjugated Carbopolyanions and Polyradicals Based upon Calix[4]arene and Calix[3]arene Rings”, J. Am. Chem. Soc., 1995, 117, 806. DOI:10.1021/ja00107a025
33. S. Rajca, A. Rajca, “Novel High-Spin Molecules: π-Conjugated Polyradical Polyanions. Ferromagnetic Spin Coupling and Electron Localization”, J.Am. Chem. Soc., 1995, 117, 9172. DOI:10.1021/ja00141a008
32. A. Rajca, S. Rajca, S. R. Desai, “Boron-centred Diradical Dianion: a New Triplet State Molecule”, J. Chem. Soc.,Chem. Commun., 1995, 1957. DOI:10.1039/C39950001957

31. A. Rajca, “Organic Di-and Polyradicals. From Spin Coupling to Magnetism?”, Chem. Rev., 1994, 94, 871. DOI:10.1021/cr00028a002
30. A. Rajca, “Toward Organic Synthesis of a Nanometer-Size Magnetic Particle”, Adv. Mater., 1994, 6, 605 (Research News). DOI:10.1002/adma.19940060720
29. A. Rajca, S. Rajca, R. Padmakumar, “Calixarene-BasedMacrocyclic Nonet (S = 4) Octaradical and Its Acyclic Sextet (S = 5/2) Pentaradical Analogue”, Angew. Chem. Int. Ed., 1994,33, 2091. DOI:10.1002/anie.199420911
28. A. Rajca*, S. Janicki, “Synthesis of Sterically Hindered 1,3-Connected Polyarylmethanes”, J. Org. Chem., 1994, 59, 7099. DOI:10.1021/jo00102a041
27. A. Rajca, R. Padmakumar, D. J. Smithhisler, S. R. Desai, C. R. Ross, J. J. Stezowski, “Synthesis of [1.1.1.1]Metacyclophane Macrocycle”, J. Org. Chem., 1994, 59, 7701. DOI:10.1021/jo00104a027
26. A. Rajca, “High Spin Polyarylmethyl Polyradicals”, in Advances in Dendritic Macromolecules, G. R Newkome, Ed.; JAI Press: Greenwich, 1994, 1, 133.

25. A. Rajca, S. Utamapanya, “Polyarylmethyl Quartet Triradicals and Quintet Tetraradicals”, J. Am. Chem. Soc., 1993, 115, 2396. DOI:10.1021/ja00059a039
24. A. Rajca, S. Utamapanya, “Spin Balls and Spin Barbells: Preparation and Magnetic Studies of S = 7/2 Dendritic Heptaradical and Progress Toward Very High Spin Dendrimers”, Liq. Cryst. Mol. Cryst., 1993, 232, 305. DOI:10.1080/10587259308035720
23. S. Utamapanya, H. Kakegawa, L. Bryant, A. Rajca, “High-Spin Polymers Synthesis of 1,3-Connected Polyarylmethane and its Carbopolyanion and Polyradical”, Chem. Mater., 1993, 5, 1053. DOI:10.1021/cm00032a00
22. A. Rajca, S. Utamapanya, D. J. Smithhisler, “Near-Degeneracy Between the Low- and High-Spin Ground States in an Alternant Hydrocarbon Diradical: Topology and Geometry”, J. Org. Chem., 1993, 5, 5650. DOI:10.1021/jo00073a024
21. A. Rajca, S. Utamapanya, “Toward Organic Synthesis of a Magnetic Particle: Dendritic Polyradicals with 15 and 31 Centers for Unpaired Electrons”, J. Am. Chem. Soc., 1993, 115, 10688. DOI:10.1021/ja00076a029

20. A. Rajca, S. Utamapanya, S. Thayumanavan, “Polyarylmethyl Octet (S = 7/2) Heptaradical and Undecet (S = 5) Decaradical”, J. Am. Chem. Soc., 1992, 114, 1884. DOI:10.1021/ja00031a055
19. A. Rajca, S. Utamapanya, “π-Conjugated Systems with Unique Electronic Structure: A Case of “Planarized” 1,3-Connected Polyarylmethyl carbodianion and Stable Triplet Hydrocarbon Diradical”, J. Org. Chem., 1992, 57, 1760. DOI:10.1021/jo00032a030

18. A. Rajca, “Synthesis of 1,3-Connected Polyarylmethanes”, J. Org. Chem., 1991, 56, 2557. DOI:10.1021/jo00007a054
17. A. Rajca, S. Utamapanya, J. Xu, “Control of Magnetic Interactions in Polyarylmethyl Triplet Diradicals Using Steric Hindrance”, J. Am. Chem. Soc., 1991, 113, 9235. DOI:10.1021/ja00024a032
16. S. Utamapanya, A. Rajca, “Topological Control of Electron Localization in π-Conjugated Polyarylmethyl Carbopolyanions and Radical Anions”, J. Am. Chem. Soc., 1991, 113, 9242. DOI:10.1021/ja00024a033

15. A. Rajca, “A Polyarylmethyl Carbotetraanion”, J. Am. Chem. Soc., 1990, 112, 5889. DOI:10.1021/ja00171a044
14. A. Rajca, “A Polyarylmethyl Quintet Tetraradical”, J. Am. Chem. Soc., 1990, 112, 5890. DOI:10.1021/ja00171a045

13. A. Rajca, P. Wang, A. Streitwieser, Jr., P. v. R. Schleyer, “Dilithiosilanes and Disodiosilanes. Ionicity of the Silicon-Metal Bond”, Inorg. Chem., 1989, 28, 3064.
12. A. Rajca, K. H. Lee, “Ab Initio Study of Destabilized π-Conjugated Systems with Large π-Overlap: Sulfur Trimethylene and Chlorine Trimethylene Cation. Electrostatics as a Dominant Factor in Multiple Bonding for Second Row Elements”, J. Am. Chem. Soc., 1989, 111, 4166.

11. A. Rajca, A. Streitwieser, Jr., “Ab Initio Study of 2-Silallyl Cation and Anion. Some Attributes of Si-Containing π-Conjugated Systems”, Organometallics, 1988, 7, 2215.
10. A. Rajca, L. M. Tolbert, “π-Conjugated Dianions. A ¹³C NMR Study”, J. Am. Chem. Soc., 1988, 110, 871.

9. A. Rajca and L. M. Tolbert, “How Does an Allene Distort to Accommodate Negative Charge. The 1,1,3,3-Tetraphenylallene System”, J. Am. Chem. Soc., 1987, 109, 1782.
8. A. Rajca, A. Streitwieser, Jr., and L. M. Tolbert, “Ab Initio Study of 2,3-Dilithiopropene”, J. Am. Chem. Soc., 1987, 109, 1790.
7. A. Streitwieser, Jr., A. Rajca, R. S. McDowell, R. Glaser, “Semipolar P-O and P-C Bonds. Theoretical Study of Hypophosphite and Related Methylenephosphoranes”, J. Am. Chem. Soc., 1987, 109, 4184.
6. A. Rajca, J. Rice, A. Streitwieser, Jr., H. F. Schaefer III, “Methaphosphate and Trismethylenemethaphosphate (P(CH₂)₃^-) Anions. Do They Have Three Double Bonds to Phosphorus?” J. Am. Chem. Soc., 1987, 109, 4189.

5. A. Rajca, D. Grobelny, S. Witek, “Cleavage of 1,3-Oxathiol-2-one Ring with n-Butyllithium. New Route to Alkynyl Thiolates”, Monatshefte Chem., 1985, 116, 1363.
4. A. Rajca and L. M. Tolbert, “Tris(diphenylmethylene)methane Dianion. Direct Evidence for π-Aromaticity”, J. Am. Chem. Soc., 1985, 107, 698.
3. A. Rajca and L. M. Tolbert, “Structure of Dilithium Tetraphenylallenide”, J. Am. Chem. Soc., 1985, 107, 2969.
2. L. M. Tolbert and A. Rajca, “6,6-Dimethyl-2,4-diphenylcyclohexadienyl Anion and the Failure of Carbanion Homoaromaticity”, J. Org. Chem., 1985, 50, 4805.

1. A. Rajca, D. Grobelny, S. Witek, M. Zbirovsky, “5-Aryl-2-oxo-1,2,4-oxathiazolones as Cyclocarbonylating Agent for 2-Aminoalcohols and 1,2-Diamines”, Synthesis, 1983, 103.