carbon monoxide in solid matrix Kinetics; byproducts: C7H8; Irradiation (UV/VIS); Mo complex co-condensed with large excess of host matrix gas (CO) at 12K, irradiated with water cold Hg-arc lamp (Philips HPK 125 W) using filter (.lambba.>320 nm) at 12 K for 120 min; not isolated, monitored by IR;

in acetonitrile Electrochem. Process; decompn., after electrolysis at appropriate potential; not isolated, detected by IR;