Structural variations in novel silver(I) complexes with bitopic pyrazole/n-heterocyclic carbene ligands.
The synthesis and structural characterization of several new silver complexes of L (L = a bidendate ligand of pyrazole and N-heterocyclic carbene) are described. The result shows that the choice of counterions, N-substitutions of L, and reaction conditions are crucial which lead to a variety of structural motifs, including novel metallomacrocycles [Ag2(mu-L)2]2+ with or without Ag...Ag close contact, a mononuclear [AgL2]+ complex, and a [LAg(NO3)]n coordination polymer. In particular, the nonbonding Ag...Ag distance and the overall geometry of the metallomacrocycles are controllable with different N-substitutions and counterions. All these complexes have been determined by X-ray diffraction. The solid-state aggregates are retained in solution as supported by the electrospray mass spectroscopic studies.
Chiu
Pei Ling
PL
Department of Chemistry, National Changhua University of Education, Changhua, Taiwan 50058.
Chen
Chih Yuan
CY
Lee
Chun-Chin
CC
Hsieh
Meng-Hua
MH
Chuang
Chuan-Hung
CH
Lee
Hon Man
HM