Aryldisilane RC_6H_4SiMe_2SiMe_3 reacted with Mo(CO)_3Py_3 in the presence of BF_3, giving (η~6-benzene) tricarbonylmolybdenum complex η~6-RC_6H_4SiMe_2SiMe_3)Mo-(CO)_3 (R = p-Me and p-OMe). Under the same condition, diaryldisilane RC_6H_4SiMe_2SiMe_2C_6H_4R reacted with two equivalents of Mo (CO )_3Py_3 to afford di-molybdenum complex (η~6,η ~6-RC_6H_4SiMe_2SiMe_2C_6H_4R)[Mo(CO_3]_2 as well as mono-molybdenum complex (η~6-RC_6H_4SiMe_2SiMe_2C_6H_4R)Mo(CO)_3 (R = H, o-Me, m-Me, p-Me and p-OMe). Unsymmetric diaryldisilane R~1C_6H_4SiMe_2SiMe_2C_6H_4R_2 underwent the above reaction to produce similarly the complexes (η~6,η~6- R~1C_6H_4SiMe_2SiMe_2C_6H_4R_2)[Mo(CO)_3]_2 and (η- R~1C_6H_4SiMe_2SiMe_2C_6H_4R~2)Mo(CO_3) (R~1,R~2 = H, p-Me和p-OMe；R~1 ≠ R~2). This mononuclear complex was a mixture of isomers with molybdenum coordinated to different phenyl groups. All complexes obtained were characterized by elemental analyses, IR and ~1H NMR spectra. The molecular structure of （η~6,η~6- RC_6H_4SiMe_2SiMe_2C_6H_4R)[Mo(CO)_3]_2(R = p-Me) has been determined by means of X-ray diffraction analysis.

Key words: CARBONYL COMPOUNDS;MOLYBDENUM COMPOUNDS;XRD;SILANE P, IR;1HNMR