Exner, O. published the artcileThe inductive effect. IV. Transmission of the inductive effect through the furan and thiophene nuclei, Formula: C5H10Cl3O3P, the publication is Collection of Czechoslovak Chemical Communications (1964), 29(9), 2016-22, database is CAplus.
cf. CA 61, 562g. The apparent dissociation constants of substituted (R = H, Me, OH, OMe, OPh, SH, SO2Ph, NMe3Cl) 5-methylpyromucic (I) and 5-methylthiophene-2-carboxylic (II) acids were determined in 80% Me Cello-solve. The relative sensitivity to substitution in both series is believed to represent the value of the mobility of the π-electrons and indirectly the measure of the aromatic character of the skeleton which decreases in the order benzene > thiophene > furan.
Collection of Czechoslovak Chemical Communications published new progress about 866-23-9. 866-23-9 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyltrichloromethylphosphonate, and the molecular formula is C5H10Cl3O3P, Formula: C5H10Cl3O3P.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics