No abstract

No abstract

No abstract

Irradiation of a mesitylene solution of the dihydride (q-C5HJ2WH2 with a mercury lamp (366 nm)gives the bis-alkyl derivative (~-C5H5),W[CH2(3,5-Me,C6- H312-IT has been shown that irradiation of the dihydride (7-C,H,),WH, (I) in benzene gives the phenylhydride (q-C5-H,),WH(C6H5) .l Similar aryl hydride products q-C5H5)2-WH(P-C,H,R), (R = Me or OMe) are formed when toluene or anisole are used as the reactant. Here we describe a different photo-induced reaction of compound (I) with p-xylene or mesitylene.M) a t 20' for 12 h (high-pressure Hg lamp, 90 W ; pyrex filters) gives an orange compound which is slightly soluble in benzene and is only slowly oxidised in air. Analysis and mass spectrometry show a stoicheiometry corresponding to 7-(&H5)2-

CsHs)2W[CH2C6H3(CH3)212, C28H32W , M= 552-5. Monoclinic, space group P2x/c (C25~,, No. 14).