REFERENCES
(1) Arduengo III, A. J.; Harlow, R. L.; Kline, M. A stable crystalline carbene. J. Am. Chem. Soc. 1991, 113, 361363.
(2) Schultz, K. M. K.; Goldberg, I.; Gusev, D. G.; Heinekey, D. M. Synthesis, structure, and reactivity of iridium NHC pincer complexes. Organometallics 2011, 30, 14291437.
(3) McKie, R.; Murphy, J. A.; Park, S. R.; Spicer, M. D.; Zhou, S. Z. Homoleptic crown N-heterocyclic carbene complexes. Angew. Chem., Int. Ed. 2007, 46, 65256528.
(4) Liu, Q. X.; Yang, X. Q.; Zhao, X. J.; Ge, S. S.; Liu, S. W.; Zang, Y.; Song, H. B.; Guo, J. H.; Wang, X. G. Macrocyclic dinuclear silver(I) complexes based on bis(N-heterocyclic carbene) ligands: synthesis and structural studies. CrystEngComm. 2010, 12, 22452255.
(5) Hu, X.; Castro-Rodriguez, I.; Olsen, K.; Meyer, K. Group 11 metal complexes of N-heterocyclic carbene ligands: nature of the metal-carbene bond. Organometallics 2004, 23, 755764.
(6) Liu, Q. X.; Xu, F. B.; Li, Q. S.; Zeng, X. S.; Leng, X. B.; Chou, Y. L.; Zhang, Z. Z. A luminescent silver(I) carbene stair polymer. Organometallics 2003, 22, 309314.
(7) Zhang, X.; Liu, B.; Liu, A.; Xie, W. L.; Chen, W. Z. Steric bulkiness-dependent structural diversity in nickel(II) complexes of N-heterocyclic carbenes: synthesis and structural characterization of tetra-, penta-, and hexa-coordinate nickel complexes. Organometallics 2009, 28, 13361349.
(8) Bruker AXS. SAINT Software Reference Manual, Madison, WI 1998.
(9) Sheldrick, G. M. SHELXTL, Program for Solution and Refinement of Crystal Structures. University of Göttingen, Göttingen, Germany 1997.
(10) Palmer, D. C. Crystal Maker 7.1.5, CrystalMaker Software, Yarnton, UK 2006.
(11) Arnold, P. L.; Casely, I. J. F-Block N-heterocyclic carbene complexes. Chem. Rev. 2009, 109, 35993611.
(12) Liu, Q. X.; Wang, H.; Zhao, X. J.; Yao, Z. Q.; Wang, Z. Q.; Chen, A. H.; Wang, X. G. N-heterocyclic carbene silver(I), palladium(II) and mercury(II) complexes: synthesis, structural studies and catalytic activity. CrystEngComm. 2012, 14, 5330–5348.
(13) Liu, Q. X.; Yao, Z. Q.; Zhao, X. J.; Zhao, Z. X.; Wang, X. G. NHC metal (silver, mercury, and nickel) complexes based on quinoxaline-dibenzimidazolium salts: synthesis, structural studies, and fluorescent chemosensors for Cu2+ by charge transfer. Organometallics 2013, 32, 34933501.
(14) Morgan, B. P.; Galdamez, G. A.; Gilliard, R. J.; Jr Smith, R. C. Canopied trans-chelating bis(N-heterocyclic carbene) ligand: synthesis, structure and catalysis. Dalton Trans. 2009, 11, 20202028.
(15) Cheng, C. H.; Chen, D. F.; Song, H. B.; Tang, L. F. Synthesis and catalytic activity of N-heterocyclic carbene silver complexes derived from 1-[2-(pyrazol-1-yl)phenyl]imidazole. J. Organomet. Chem. 2013, 726, 18.
(16) Bettens, R. P. A.; Dakternieks, D.; Duthie, A.; Kuan, F. S.; Tiekink, E. R. T. The influence of crystal packing effects upon the molecular structures of Ph3Sn(CH2)nSnPh3, n = 1 to 8, as determined by X-ray crystallography and DFT molecular orbital calculations. supramolecular aggregation patterns sustained by C–H•••π interactions. CrystEngComm. 2009, 11, 13621372.
(17) Pickering, A. L.; Seeber, G.; Long, D. L.; Cronin, L. The importance of π-π, π-CH and N-CH interactions in the crystal packing of Schiff-base derivatives of cis, cis- and cis, trans-1,3,5-triaminocyclohexane. CrystEngComm. 2005, 7, 504510.
(18) dit Dominique, F. J. B.; Gornitzka, H.; Sournia-Saquet, A.; Hemmert, C. Dinuclear gold(I) and gold(III) complexes of bridging functionalized bis(N-heterocyclic carbene) ligands: synthesis, structural, spectroscopic and electrochemical characterizations. Dalton Trans. 2009, 340352.
(19) Chan, S. C.; Chan, M. C. W.; Wang, Y.; Che, C. M.; Cheung, K. K.; Zhu, N. Organic light-emitting materials based on bis(arylacetylide)platinum(II) complexes bearing substituted bipyridine and phenanthroline ligands: photo- and electroluminescence from 3MLCT excited states. Chem. Eur. J. 2001, 7, 41804189.