in water; acetic acid; ethyl acetate byproducts: (13)CH4; High Pressure; IrI3/IrI4, (PtI2(CO))2 (Pt/Ir=1/4) in CH3COOH (64 wtpercent), CH3COOCH3 (20 wtpercent), H2O (6 wtpercent), (13)CH3I (10 wtpercent), pressured under 30 bar of (12)CO/(13)CO, heated to 86°C; not sepd., detected by spectra;