Synthesis and Identification of Some Organotungsten Halides RC_5 H_4-(CO)_3 WX(R=MeCO, MeO_2 C,EtO_2 C;X= CI,Br,I)

Several organotungsten halides RC_5H_4(CO)_3 WX (2a～2h) (R=MeCO, MeO_2C,EtO_2C; X=Cl, Br, I) were synthesized via the reactions of RC_5H_4(CO)_3WNa with I_2, PX_3(X=Cl, Br, I) PhPCl_2, p-CH_3C_6H_4PCl_2 or MeAsI_2. The single crystal molecular structureof 2b (R=MeCO, X=Br) has been determined by X-ray diffraction method. The crystals be-long to monoclinic space group P 2_1. Crystallographic data: a=0.6716(1), b=0.8336(2),c=1.0568(1)nm; β=94.54(7)°; V=0.5899nm~3; Z=2; D_x=2.562g/cm~3; F(000)=416.