名称:
Synthesis and structural studies of molybdenum and palladium complexes of 1,5-diaza-3,7-diphosphacyclooctane ligands
摘要:
1,5-Diaza-3;7-diphosphacyclooctanes form 1:1 complexes with the metal fragments Mo(CO)(4) and PdCl2. Two of these products along with a parent heterocycle have been structurally characterized. The [P(Ph)CH2N(2-pyridyl)CH2], ring is found in a crown conformation while its cis-Mo(CO)(4) complex adopts a chair-boat ligand conformation. On the other hand, the cis-PdCl2 complex of [P(Ph)CH2N(Bz)CH2](2) is found to retain a highly flattened crown ligand conformation Unlike rha related eight-membered heterocycle 1,3,5,7-tetraoxa-2,3,6,8-tetraphosphacyclooctane which behaves as a tetradentate ligand chelating homo- or hetero-bimetallics, coordination to a second metal by these complexes was not realized. (C) 1999 Elsevier Science Ltd. All rights reserved.