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Synthesis and Reactivity of Monocyclopentadienyltantalum(V) Siloxide Complexes
Author(s) -
Conde Ana,
Fandos Rosa,
Otero Antonio,
Rodríguez Ana,
Terreros Pilar
Publication year - 2008
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/ejic.200800229
Subject(s) - chemistry , isocyanide , tantalum , reactivity (psychology) , cationic polymerization , medicinal chemistry , yield (engineering) , stereochemistry , organic chemistry , metallurgy , medicine , materials science , alternative medicine , pathology
The new tantalum siloxide complex [TaCp*Me 3 (OSiPh 3 )] ( 1 ; Cp* = η 5 ‐C 5 Me 5 ) has been synthesized. The reaction of complex 1 with isocyanides yields the respective azatantalacyclopropanes [TaCp*(η 2 ‐Me 2 CNxylyl)Me(OSiPh 3 )] ( 2 ; xylyl = 2,6‐dimethylphenyl) and [TaCp*(η 2 ‐Me 2 CN t Bu)Me(OSiPh 3 )] ( 3 ). The molecular structure of complex 2 has been established by X‐ray diffraction. Complex 2 reacts with a second mol‐equiv. of 2,6‐xylyl isocyanide to yield [TaCp*(Nxylyl)[N(xylyl)CMe=CMe 2 )(OSiPh 3 )] ( 4 ). The reaction of 1 with carbon monoxide gives [TaCp*(O)(OCMe=CMe 2 )(OSiPh 3 )] ( 5 ), whereas 1 reacts with B(C 6 F 5 ) 3 to give the corresponding cationic compound [TaCp*Me 2 (OSiPh 3 )][MeB(C 6 F 5 ) 3 ] ( 6 ). (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)