SYNTHESIS AND PROPERTIES OF 1,2-DIARYL-4,5,6,7-TETRAHYDRO-1H-1,3-DIAZEPINES AND 1,2-DIARYL-1,4,5,6,7,8-HEXAHYDRO-1,3-DIAZOCINES. COMPARISON WITH THE FIVE- AND SIX-MEMBERED HOMOLOGS