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Diphosphate−Zinc Complexes with Tridentate Coligands
Author(s) -
Groß Florian,
MüllerHartmann Alexandra,
Vahrenkamp Heinrich
Publication year - 2000
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200011)2000:11<2363::aid-ejic2363>3.0.co;2-m
Subject(s) - chemistry , zinc , amine gas treating , chelation , denticity , hydrolysis , cleavage (geology) , stereochemistry , ternary complex , medicinal chemistry , inorganic chemistry , metal , enzyme , organic chemistry , geotechnical engineering , fracture (geology) , engineering
Diorganodiphosphates (POP 2− ) and a triorgano‐methylenediphosphonate (PCP − ) have been combined with zinc salts and the tridentate ligands L [L = bis(benzimidazolylmethyl)amine, bis(2‐pyridylmethyl)amine, triazacyclononane, trimethyltriazacyclononane, and (dimethylaminoethyl)(2‐pyridylmethyl)amine]. The resulting ternary complexes have been found to contain four‐, five‐, or six‐coordinate zinc. Four‐coordinate zinc has been identified in the complex types [L·Zn(PCP)] + and [L·Zn(POP)Zn·L] 2+ , containing monodentate phosphate ligands. Five‐coordinate zinc has been found in the complexes [L·Zn(POP)] with chelating diphosphate ligands. Six‐coordinate zinc has been observed in the complex type [L·Zn(POP)·H 2 O] containing chelating diphosphates and in the complex type [L·Zn(POP)] 2 in which the diphosphates act as tridentate bridging ligands. In a few cases, hydrolytic cleavage of the diphosphates resulted in the isolation of the trinuclear complexes [(L·Zn) 3 (ROPO 3 ) 2 ] HPO 4 containing triply‐bridging monophosphates.