Synthesis and Structure of Tetra-p-tolylantimony Complexes [(4-MeC_6H_4)_4Sb]_2~+ [Hg_2I_6]~(2–), [(4-MeC_6H_4)_4Sb]_2~+ [HgI_4]~(2–), [(4-MeC_6H_4)_4Sb]_3~+ [Sb_3I_(12)]~(2–), and [(4-MeC_6H_4)_4Sb]~+[ReO_4]~–

摘要

Complexes [(4-MeC_6H_4)_4Sb]_2~+ [Hg_2I_6]~(2–) (I), [(4-MeC_6H_4)_4Sb]_2~+ [HgI_4]~(2–) (II), and [(4-MeC_6H_4)_4Sb]_2~+ [Sb_3I_(12)]~(2–) (III) were synthesized by reactions of tetra-p-tolylantimony iodide with mer-cury iodide and antimony iodide, respectively. Tetra-p-tolylantimony perrhenate [(4-MeC_6H_4)_4Sb]~+[ReO_4]~–(IV) was prepared from tetra-p-tolylantimony chloride and sodium perrhenate in acetone. Crystal structures of complexes I, II, and IV were determined by X-ray crystallography. Mercury and rhenium atoms have tet-rahedral coordinations in these complexes. The Hg–I and Re–O distances in the structures of I, II, and IV vary within 2.7719(13)–2.7908(12) A, 2.7028(3)–2.9163(3) A, and 1.693(3)–1.744(3) A, respectively. Anti-mony atoms in two crystallographically independent trinuclear centrosymmetric [Sb_3I_(12)]~(2–) anions of com-plex III have an octahedral environment. Each terminal SbI_3 fragment (Sb–I_t, 2.8265(9)–2.8333(10) A) is bound to the central atom through tree bridging iodine atoms (Sb(2)–I_(br), 3.2275(9)–3.3620(10) A). The dis-tances between the central Sb atom and bridging iodine atoms are much shorter (Sb(1)–I_(br), 3.0153(6)–3.0316(6) A; Sb(3)–I_(br), 2.9926(6)–3.0074(6) A).