Bis (α-diazophenacyl) mercury (2a), bis (α-diazo-2, 4, 6-trimethylphenacyl) mercury (2b), bis (1-diazo-3, 3-dimethyl-2-oxobutyl) mercury (2c), and bis (1-diazo-2-phenylacetonyl) mercury (2d) have been prepared by treatment of the corresponding α-diazo ketones with mercuric oxide. The solution IR, UV, and 1H NMR spectra of 2a–d and of three other mercuribis (α- diazo ketones) have been compared with the spectra of the corresponding α-diazo ...