“…This sulphenyl chloride, which may be prepared also by chlorinolysis of 4-chlorobenzyl tetrachloro-4-pyridyl sulphide [360], reacts normally with amines [359,371], acetone [371], and sodium cyanide [371], and it gives tetrachloro-4-pyridyl phenyl sulphide with phenylmagnesium bromide [359]. With alkenes, it can undergo both Markownikov and anti-Markownikov addition to give a mixture of products, the ratio being solvent dependent [373]. Acrylonitrile is claimed [361] to give exclusively 3-[ (tetrachloro-4-pyridyl)thio] propionitrile.…”