Synthesis and catalytic properties of polynuclear molybdenum silicon-containing carbene complexes |
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| Authors: | Yu E Begantsova L N Bochkarev Yu P Barinova G V Basova N E Stolyarova I K Grigor’eva I P Malysheva G K Fukin E V Baranov Yu A Kurskii G A Abakumov |
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| Institution: | (1) G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 ul. Tropinina, 603950 Nizhny Novgorod, Russian Federation |
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| Abstract: | The molybdenum silicon-containing carbene complexes PhMe2Si—CH=Mo(NAr)(OR)2 (1), Ph2SiCH=Mo(NAr)(OR)2]2 (2), and (RO)2(ArN)Mo=CH—(SiMe2)2—CH=Mo(NAr)(OR)2 (Ar = 2,6-Pri
2C6H3; R = CMe2CF3) were synthesized by the reaction of the R′— CH=Mo(NAr)(OR)2 compounds (R′ = But or PhMe2C) with silicon-containing vinyl reagents. The structures of complexes 1 and 2 and the known PhMe2C—CH=Mo(NAr)(OCMe2CF3)2 compound were established by X-ray diffraction. The catalytic properties of the silicon-containing carbene complexes in homometathesis
of hex-1-ene and metathesis polymerization of cyclooctene were studied. The catalytic activity of these complexes and the
stereoregularity of the resulting polyoctenamers substantially depend on the nature of the substituent at the carbene carbon
atom.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 247–252, February, 2007. |
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| Keywords: | carbene complexes molybdenum silicon synthesis X-ray diffraction study metathesis polymerization |
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