
Journal of Organometallic Chemistry p. 251 - 258 (1998)
Update date:2022-08-03
Topics:
Groeger, Gunther
Olbrich, Falk
Schulte, Petra
Behrens, Ulrich
The dinuclear alkyne copper(I)-halide complexes [CuX(tmtch)]2 [tmtch=3,3,6,6-tetramethyl-l-thiacyclohept-4-yne; X=Cl (2a), X=Br (2b), X=I (2c)] react with the N containing Lewis bases ammonia, aniline, pyridine, and diethylamine to form the mononuclear compounds [CuX(N-base)(tmtch)] (5a: X=Cl, base=ammonia; 5b: X=Cl, base=aniline; 5c: X=Cl, base=pyridine; 5d: X=Cl, base=diethylamine; 5e: X=Br, base=diethylamine; 5f: X=I, base=diethylamine). X-ray diffraction studies on all compounds (except 5b) reveal trigonal-planar coordinated mononuclear Cu(I) complexes with the CC triple bond (123.7 pm) in the coordination plane. A strong Cu(I) alkyne interaction with two slightly different Cu-C bond lengths is found: a shorter distance (194.0 pm) to the carbon atom in trans position to the N base and a longer one (195.7 pm) to the carbon atom in trans position to the halide ligand.
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Doi:10.1016/S0960-894X(98)00240-6
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(1998)