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Heterobimetallic chemistry: Heterobimetallic complexes derived from monometallic copper(II) complex of bis(2-hydroxy-1-naphthaldehyde)malonoyldihydrazone

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Title Heterobimetallic chemistry: Heterobimetallic complexes derived from monometallic copper(II) complex of bis(2-hydroxy-1-naphthaldehyde)malonoyldihydrazone
 
Creator LAL, RA
CHAKRABORTY, J
BHAUMIK, S
KUMAR, A
 
Subject dioxouranium(vi) complexes
bimetallic reactivity
magnetic-properties
ligands
spectra
sites
 
Description Monometallic copper(II) complex [Cu(LH2)(H2O)(2)] (1) and heterobimetallic complexes [MCu(L)(H2O)(3)] (where M = UO2(2) and Zn(4)) and [MCu(L)(H2O)(4)] (where M = MoO2(3), Ni(5), Co(6) and Mn(7)) and homobimetallic copper(II) complex [Cu-2(L)(H2O)(4)].2H(2)O(8) have been isolated and characterized by analytical, molecular weight, magnetic moment, electrical conductance, electronic IR and ESR spectral data. IR spectral evidences indicate that dihydrazone coordinates to the metal centres in enol forms. The monometallic copper(II) complex (1) and the heterobimetallic complexes UO2Cu (2) and MoO2Cu (3) and Zn-Cu (4) are normal paramagnetic indicating absence of any metal-metal interaction in the structural unit of the complexes while the remaining heterobimetallic complexes Ni-Cu(5), Co-Cu (6) and Mn-Cu (7) have much less mu(eff) values than those required for 3, 4 and 6 unpaired electrons indicating considerable metal - metal interactions. Copper has distorted octahedral geometry in monometallic and heterobimetallic complexes. Uranium has pentagonal bipyramidal stereochemistry while zinc has square pyramidal stereochemistry. However, copper(II) has square pyramidal stereochemistry in homobimetallic complex (8).
 
Publisher NATL INST SCIENCE COMMUNICATION
 
Date 2011-08-19T04:59:43Z
2011-12-26T12:56:04Z
2011-12-27T05:44:12Z
2011-08-19T04:59:43Z
2011-12-26T12:56:04Z
2011-12-27T05:44:12Z
2002
 
Type Article
 
Identifier INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY, 41(6), 1157-1162
0376-4710
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10234
http://hdl.handle.net/10054/10234
 
Language en