in cyclohexane Irradiation (UV/VIS); N2; irradiation of cyclohexane solns. of (C6H2(CH3)3Si(CH3)2)2 in presence of 10-fold excess of (C4H9)3SnH with an array of low-pressure mercury lamps at 254 nm for 4-12 h;; sepn. and purifn. by preparative gas chromy.;;

in cyclohexane Irradiation (UV/VIS); under N2: irradiation of cyclohexane solns. of (C6H2(CH3)3Si(CH3)2)2 in presence of a 1-fold excess of (C4H9)3SnH and a 10-fold excess of CH3OSi(CH3)3 with an array of low-pressure mercury lamps at 254 nm for 4-12 h;; separation and purification by preparative gas chromatography;;