4 and r 4 hereinafter denotes a saturated or unsaturated c 1 to c 30 hydrocarbon group which may contain a heteroelement selected from nitrogen oxygen sulfur silicon fluorine chlorine bromine or iodine by a reaction in which the compound hr 1 r 2 six is also produced r 4 is specifically exemplified by monovalent radicals such as methyl ethyl vinyl propyl 3 3 3 trifluoropropyl isopropyl isopropenyl allyl n butyl isobutyl sec butyl tert butyl butenyl crotyl n pentyl neopentyl pentenyl cyclopentyl cyclopentenyl n hexyl hexenyl cyclohexyl cyclohexenyl heptyl methylcyclohexyl octyl octenyl cyclooctyl phenyl 4 chlorophenyl 4 fluorophenyl pentafluorophenyl 4 bromophenyl 4 vinylphenyl 4 ethylphenyl 4 dodecylphenyl 4 trimethylsilyphenyl 4 isopropenylphenyl 4 cyanophenyl 3 chlorophenyl 3 fluorophenyl 3 bromophenyl 3 vinylphenyl 3 ethylphenyl 3 dodecylphenyl 3 trimethylsilylphenyl 3 isopropenylphenyl p tolyl m tolyl o tolyl and so forth compound i can be produced by simply mixing compounds v and vi in the presence or absence of solvent reaction temperatures of 20 u00b0 c to 150 u00b0 c can be used aprotic organic solvents can be used as the solvent for this reaction for example ethers such as diethyl ether tetrahydrofuran and so forth saturated hydrocarbons such as butane pentane hexane heptane octane cyclohexane methylcyclohexane and so forth unsaturated hydrocarbons such as butene pentene hexene octene cyclohexene and so forth aromatic.