Reaktionsprodukte yon Oxylsäuremethylester-N-methylamiden mit Antimon(V)-chlorid. Molekülspektren und Struktur

M . R ö s s l e r [1] , W . S c h w a r z u n d A . S c h m i d t Institut für Anorganische Chemie der Universität Stuttgart Z . Naturforsch. 34b , 398-405 (1978); eingegangen am 9. Oktober/5. Dezember 1978 Oxal ic Ac id Methylester-N-methylamides, A n t i m o n y ( V ) Chloride Oxalic acid dimethylester and the oxalic acid methylester-N-methylamides 2 and 4, resp., react with ant imony(V) chloride to yield the 1 : 1 addit ion c o m p o u n d 5 or the cycl ic tetrachloroant imony(V) compounds 1, 3 and 6, resp., which represent Sb02C2 and SbONC2 five ring systems, resp. Li oxalic acid methylester-N-methyl imide (9) and antim o n y ^ ) chloride gives the bicycl ic oc tachloro -N-methylamido o x a l a t o 0 , 0 ' 0 , N d iant imony(V) (10). The crystal and molecular structure of tetrachloro-N-methylamino o x a l a t o 0 , 0 ' a n t i m o n y ( V ) (3) is determined b y X r a y analysis. The vibrational and i H N M R spectra o f 2 1 0 are reported and discussed.