in tetrahydrofuran under N2, addn. of C6H2(C(CH3)3)3PCl2 at 0°C to a soln. of (C5(CH3)5)(CO)(NO)ReP(Si(CH3)3)2, stirred for 30 min at 0°C; not isolated, detected by (31)P-NMR and IR-spectroscopy;