Premium
Synthese und Struktur von (R 3 P)Ni(1,6‐Heptadiin)‐Komplexen
Author(s) -
Proft Bernd,
Pörschke KlausRichard,
Lutz Frank,
Krüger Carl
Publication year - 1994
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19941270413
Subject(s) - chemistry , ligand (biochemistry) , alkene , nickel , stereochemistry , derivative (finance) , transition metal , chelation , metal , medicinal chemistry , crystallography , inorganic chemistry , catalysis , organic chemistry , biochemistry , receptor , financial economics , economics
Synthesis and Structure of (R 3 P)Ni(1,6‐Heptadiin) Complexes Displacement of the alkene ligand in Ligand‐Ni(0)(1,6‐diene) complexes by 1,6‐heptadiyne, the parent 1,6‐diyne, affords the complexes (Me 3 P)Ni(η 2 ,η 2 ‐C 7 H 8 ) ( 1 ) and (Ph 3 P)Ni(η 2 ,η 2 ‐C 7 H 8 ) ( 2 ). According to an X‐ray structure analysis of the PMe 3 derivative 1 the nickel atom is ideally trigonal‐planar coordinated by the phosphane and both CC bonds. The increased stability of the complexes as compared to Ligand‐Ni(HCCH) 2 complexes is referred to the strong chelating effect which is special to the 1,6‐functionalization. The compounds can be considered to be model complexes for the key intermediates of numerous transition metal‐mediated coupling reactions of (substituted and unsubstituted) 1,6‐diynes.