FORMATION OF THE TRANS-[REO2]+ GROUP FROM THE REACTIONS OF RENCL2(PPH3)2, RECL4(PPH3)2, AND RECL3(CH3CN)(PPH3)2 WITH CHELATING AMINES AND TETRAAZAMACROCYCLES - CRYSTAL-STRUCTURE OF TRANS-[REO2(CYCLAM)](PF6) (CYCLAM = 1,4,8,11-TETRAAZACYCLOTETRADECANE)