SYNTHESIS AND POLYMERISATION OF BIS(η-STYRENE)MOLYBDENUM AND RELATED STUDIES: CRYSTAL STRUCTURES OF Mo(η-C6H5CH2CH=CH2)2 AND BF4

Article abstract of DOI:10.1016/S0022-328X(00)99703-1

The synthesis of the compounds Mo(η-C6H5R)2, where R = CH=CH2, 4-C6H4CH=CH2 and CH2CH=CH2 is described.The crystal structure of Mo(η-C6H5CH2CH=CH2)2 has been determined.These vinyl monomers are polymerised by free radical initiation using AIBN.Di-η-benzenemolybdenum is lithiated by BuⁿLi/Me2NCH2CH2NMe2 to give a bis(η-lihiobenzene)molybdenum derivative, which reacts with D2O, MeI, or SiMe3Cl to give Mo(η-C6H5R)2, where R = D, Me or SiMe3 respectively.The dilithio system reacts with SiMe2Cl2 to give a polymeric mixture containing ClnSiMe2Cl, and hydrolysis of this yields the disiloxane Mo(η-C6H5SiMe2OSiMe2-η-C6H5), whose crystal structure has been determined.Co-condensation of molybdenum atoms with dimethylphenylsilane gives Mo(η-C6H5SiMe2H)2, which is oxidised by aqueous HBF4 to give the compound BF4, whose crystal structure has been determined.