Syntheses, crystal structures, thermal analysis, and spectra of two complexes containing bis(maleonitriledithiolate)nickelate(II) anion and di-substituted chlorobenzyl triphenylphosphinium cation

• Published in: Inorganic and nano-metal chemistry Vol. 47; no. 5; pp. 722 - 729
• Main Authors: Hu, Tian, Zheng, Xiao-Geng, Lu, Zuo-Ye, Wang, Bin-Wu, Liu, Xiao-Ping, Yang, Le-Min, Zhou, Jia-Rong, Ni, Chun-Lin
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 04.05.2017
• Subjects: 3D structures; Bis(maleonitriledithiolate)nickelate(II) anion; di-substituted benzyl triphenylphosphinium; weak interactions
• ISSN: 2470-1556; 2470-1564
• DOI: 10.1080/15533174.2016.1212238

Two new ion-pair metal-bis(dithiolene) complexes, with the formulas [2,4-BiClBzTPP] 2 [Ni(mnt) 2 ](1) and [2,6-BiClBzTPP] 2 [Ni(mnt) 2 ](2) ([2,4-BiClBzTPP] + = 2,4-bichlorobenzyl)triphenylphosphonium, [2,6-BiClBzTPP] + = 2,6-bichlorobenzyl)triphenylphosphonium, and mnt 2− = maleonitriledithiolate) have been synthesized and characterized by spectroscopic and physicochemical methods as well as X-ray diffraction. Two complexes crystallize in the triclinic space group P-1 and the central Ni(II) ion shows a distorted square planar coordination geometry. The anions (A) and cations (C) in complex 1 stack together into a columnar structure with ···A-CC-A-CC-A··· sequence. Lattice stability is provided by weak interactions observed in 1 and 2 such as C-H···N, C-H···Cl, C-H···S, C-H···Ni, and C-H···π hydrogen bonds which result in the forming of a 3D network structure. Thermal analysis reveals that 1 and 2 are stable up to 211°C and 208°C, respectively, and the final decomposition product of two complexes is metal nickel.