REACTIONS OF CIS-4-TERT-BUTYLCYCLOTHEXYL AND TRANS-4-TERT-BUTYLCYCLOHEXYL AND ERYTHRO-3-PHENYL-2-BUTYL AND THREO-3-PHENYL-2-BUTYL CHLOROFORMATES AND CHLORIDES WITH SILVER HEXAFLUOROANTIMONATE IN ACETIC-ACID - COMPARISON WITH DEAMINATIONS AND SOLVOLYSE