1: H2SO4 / water; diethyl ether 2: diazomethane 3: tetramethylethylene View Scheme

acetyl chloride in tetrahydrofuran; hexane; dichloromethane byproducts: phenylacetophenone; further products; Tetramethylammonium((oxido)(phenyl)carbene)pentacarbonylchromium in CH2Cl2 was treated with acetyl chloride at -20°C; solvent was replaced with THF; at -20°C addn. of 3-hexyne provided a mixture of the products; identification of products by H-NMR, GC, GC-MS;

acetyl chloride in tetrahydrofuran; hexane; dichloromethane byproducts: phenylacetophenone; further products; Tetramethylammonium((oxido)(phenyl)carbene)pentacarbonylchromium in CH2Cl2 was treated with acetyl chloride at -20°C; solvent was replaced with THF; at -20°C addn. of 3-hexyne provided a mixture of the products; identification of products by H-NMR, GC, GC-MS;