. . . . . "onate or perchlorate, and R, R and R are e.g., aliphatic or aromatic radicals such as methyl, ethyl, propyl, benzyl or phenyl'. mo-(omem hsmcm-ir-h v i X- R: in which X, n R, R and R are as above mentioned, and R is an alkyl or aromatic radical such as methyl, phenyl or p-tert. octylphenyl. ( structures'sinularlto A and B in which N is replaced by -s+= O1-P+E a N-(CHsCHzOh-CEECHr-N v Tetraethoxye" .