Synthesis of 6-aryloxy- and 6-p-tolylthioxy-2,10-dichloro-12-trichloromethyl-12H-dibenzo[d,g][1,3,2]dioxaphosphocin 6-oxides - X-ray diffraction analyses of 6-(4'-chlorophenoxy)-2,10-dichloro-12-trichloromethyl-12H-dibenzo[d,g][1,3,2]dioxaphosphocin 6-oxide and triethylammonium 2-methylphenyl 2-[{2',2',2'-trichloro-1'-(2''-hydroxyl-5''-chlorophenyl)}ethyl]-4-chlorophenyl phosphate

6-Aryloxy- and 6-p-tolylthioxy-2,10-dichloro-12-trichloromethyl-12H-dibenzo[d,g][1,3,2]dioxaphosphocin 6-oxides were synthesized and characterized by IR, H-1, C-13, P-31, and mass spectral analyses for the first time. The H-1 chemical shifts for H(12) at the carbon bridge occurred between delta 6.15 and 6.40 which suggested a common environment and one conformer, but the presence of more than one conformer in each example cannot be entirely eliminated. Obviously the trichloromethyl groups attached to C(12) induces a significant downfield shift of H(12). An X-ray diffaction analysis of solid 6-(4'-chlorophenoxy)-2,10-dichloro-12-trichloromethyl-12H-dibenzo[d,g][1,3,2]dioxaphosphocin 6-oxide (3j) shows it is a boat-chair with the trichloromethyl group in a pseudo equatorial arrangement and with the phosphoryl group in a ''down arrangement'' of a boat-chair conformer. An interesting by-product, namely triethylammonium 2-methylphenyl 2-[{2',2',2'-trichloro-1'-(2 ''-hydroxyl-5 ''-chlorophenyl)}ethyl]-4-chlorophenyl phosphate (5), was isolated when attempts were made to purify a crude sample of 3b. Thus, it appears that either the initial ring closure did not occur between 1 and 2b or, in the purification process for 3b, the ring was opened in the presence of residual triethylamine. System 5 was also confirmed by X-ray analysis.