Open AccessStabilization of Unusual Substrate Coordination Modes in Dinuclear Macrocyclic Complexes
Author(s) -
Vasile Lozan
Publication year - 2010
Publication title -
chemistry journal of moldova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.275
H-Index - 5
eISSN - 2345-1688
pISSN - 1857-1727
DOI - 10.19261/cjm.2010.05(1).02
Subject(s) - chemistry , steric effects , nickel , substrate (aquarium) , ligand (biochemistry) , sulfide , sulfur , hexa , borohydride , stereochemistry , crystallography , coordination complex , metal , organic chemistry , catalysis , biochemistry , oceanography , receptor , geology
The steric protection offered by the macrobinucleating hexaazaditiophenolateligand (L) allows for the preparation of the first stable dinuclear nickel(II) borohydride bridged complex, which reacts rapidly with elemental sulphur producing a tetranuclear nickel(II) complex [{(L)Ni2}2(μ-S6)]2+ bearing a helical μ4-hexa- sulfide ligand. The [(L)CoII 2]2+ fragment have been able to trap a monomethyl orthomolybdate in the binding pocket. Unusual coordination modes of substrate in dinuclear macrocyclic compounds was demonstrated.