Synthesis and X-ray crystal structure of a macrocyclic arsa-aza-oxa-cryptand containing eight-membered As4O4 rings
Abstract
Reaction of N[(CH2)2As(C6H5)2]3(1) with gaseous HI leads to{HN[(CH2)2Asl2]3}I2(2) and hydrolysis of (2) with H2O–NH3 in tetrahydrofuran gives [N(CH2CH2)3]8(As4O4)6(3); single crystal X-ray diffraction shows that one moleculer of (3) contains six eight-membereds As4O4ring connected together by triethylamine units.