Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/11699
Title: Diorgano-gallium and -indium complexes with 1-(hydroxymethyl)pyrazole and 3,5-dimethyl-1-(hydroxymethyl)pyrazole: Synthesis, characterization and crystal structures of [Me<sub>2</sub>MOCH<sub>2</sub>dmpz]<sub>2</sub> (M = Ga, In) and [(Me<sub>2</sub>Ga)<sub>2</sub>(<img src='/image/spc_char/micro.gif' border=0>-OH)(<img src='/image/spc_char/micro.gif' border=0>-dmpz)][dmpzCH<sub>2</sub>OH]
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 [(R<sub>2</sub>MO-CH<sub>2</sub>-(pz)-(R′)<sub>2</sub>]<sub>2</sub> (R = Me, Et; M = Ga/In; R′ = H, Me) in nearly quantitative yields. The complex, [Me<sub>2</sub>GaOCH<sub>2</sub>dmpz]<sub>2</sub> when recrystallized from dichloromethane in air, afforded a mixed bridged complex, [{Me<sub>2</sub>Ga}<sub>2</sub>(<img src='/image/spc_char/micro.gif' border=0>-OH)(<img src='/image/spc_char/micro.gif' border=0>-dmpz)][dmpzCH<sub>2</sub>OH], formed by hydrolysis by aerial moisture. These complexes have been characterized by elemental analysis, IR, NMR (<sup>1</sup>H and <sup>13</sup>C{<sup>1</sup>H}). The molecular structures of [Me<sub>2</sub>MOCH<sub>2</sub>dmpz]<sub>2</sub> (M = Ga, In) and [(Me<sub>2</sub>Ga)<sub>2</sub>(<img src='/image/spc_char/micro.gif' border=0>-OH)(<img src='/image/spc_char/micro.gif' border=0>-dmpz)][dmpzCH<sub>2</sub>OH] 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.
Description: 674-679
URI: http://hdl.handle.net/123456789/11699
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.50A(05) [May 2011]

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