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IJC-A Vol.50A(05) [May 2011] >


Title: Diorgano-gallium and -indium complexes with 1-(hydroxymethyl)pyrazole and 3,5-dimethyl-1-(hydroxymethyl)pyrazole: Synthesis, characterization and crystal structures of [Me2MOCH2dmpz]2 (M = Ga, In) and [(Me2Ga)2(-OH)(-dmpz)][dmpzCH2OH]
Authors: Kushwah, Nisha P
Pal, Manoj K
Wadawale, Amey P
Jain, Vimal K
Keywords: Coordination chemistry
Organometallic chemistry
Crystal structures
X-ray diffraction
Gallium
Indium
Pyrazoles
Issue Date: May-2011
Publisher: NISCAIR-CSIR, India
Abstract: The reactions of triorgano-gallium and -indium etherate with 1-(hydroxymethyl)pyrazole and 3,5-dimethyl-1-(hydroxymethyl) pyrazole in benzene yields complexes of the type [(R2MO-CH2-(pz)-(R′)2]2 (R = Me, Et; M = Ga/In; R′ = H, Me) in nearly quantitative yields. The complex, [Me2GaOCH2dmpz]2 when recrystallized from dichloromethane in air, afforded a mixed bridged complex, [{Me2Ga}2(-OH)(-dmpz)][dmpzCH2OH], formed by hydrolysis by aerial moisture. These complexes have been characterized by elemental analysis, IR, NMR (1H and 13C{1H}). The molecular structures of [Me2MOCH2dmpz]2 (M = Ga, In) and [(Me2Ga)2(-OH)(-dmpz)][dmpzCH2OH] have been established by single crystal X-ray diffraction analyses. The analyses reveal their dimeric structures with the former two having five coordinated metal centers while the gallium atom in the latter has a distorted tetrahedral configuration.
Page(s): 674-679
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0975(Online); 0376-4710(Print)
Source:IJC-A Vol.50A(05) [May 2011]

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