8-DIMETHYL-1,8-DIHALO-1,8-DIGERMACYCLOTETRADECANES - THE 1ST GERMAMACROCYCLES WITH ANION TRANSPORT CAPABILITY

It has been shown that -dichloro-1,8-dimethyl-1,8-digermacyclotetradec ane transports chloride anion more effectively than bromide anion in a U-tube test. The dibromo analogue also can transport anions. The effi ciency of transport of open chain analogues with a similar environment around germanium is inferior to that of cyclic systems which confirms the essential role of the ring structure for anion transport. The ani on transport capability was examined for other germanium-containing 14 -membered rings. A possible mechanism for anion transport is proposed.