title: Syntheses of 2,4-disubstituted 1,3,5-triazapentadienyl ligands having two guanidinato moieties and their use in the isolation of copper(I) complexes.
abstract: 2,4-N,N'-Disubstituted 1,3,5-triazapentadienyl ligands as their lithium salts [Li{(N(R)C(R'))2N}]2 [where R = SiMe3 here and hereafter and R' = dimethylamino (1) or 1-piperidino (2)] were synthesized via the reactions of LiN(SiMe3)2 with 2 equiv of the alpha-hydrogen-free carbonitrile dimethylcyanamide or 1-piperdinecarbonitrile and used in the isolation of the two-coordinate copper(I) complexes [Cu{(N(R)C(R'))2N}]2 [R' = dimethylamino (3) and 1-piperidino (4)]. Complex 2 features a twisted W-shaped ligand backbone in the solid state. Complexes 3 and 4 show an unusual 12-membered ring dinuclear copper( I) triazapentadienyl and a less expressed ability to form a stable delocalized triazapentadienyl system.
authors.affiliation: Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, People's Republic of China. mszhou@sxu.edu.cn
authors.forename: Meisu
authors.initials: M
authors.lastname: Zhou
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.forename: Hongbo
authors.initials: H
authors.lastname: Tong
authors.forename: Yanping
authors.initials: Y
authors.lastname: Song
authors.forename: Tao
authors.initials: T
authors.lastname: Gong
authors.forename: Jianping
authors.initials: J
authors.lastname: Guo
authors.forename: Linhong
authors.initials: L
authors.lastname: Weng
authors.forename: Diansheng
authors.initials: D
authors.lastname: Liu