Synthesis and Structure of Tetra-p-tolylantimony Complexes
[Hg₂I₆]², [HgI₄]²,
[Sb₃I₁₂]², and [(4-MeC₆H₄)₄Sb]⁺[ReO₄]

V. V. Sharutin, V. S. Senchurin, O. K. Sharutina, A. P. Pakusina, and O. A. Fastovets

Blagoveshchensk State Pedagogical University, ul. Lenina 104, Blagoveshchensk, 675000 Russia

Received September 22, 2008

Abstract—Complexes [Hg₂I₆]^2– (I), [HgI₄]^2– (II), and
[Sb₃I₁₂]^2– (III) were synthesized by reactions of tetra-p-tolylantimony iodide with mercury
iodide and antimony iodide, respectively. Tetra-p-tolylantimony perrhenate [(4-MeC₆H₄)₄Sb]⁺[ReO₄]^– (IV) was
prepared from tetra-p-tolylantimony chloride and sodium perrhenate in acetone. Crystal structures of com-
plexes I, II, and IV were determined by X-ray crystallography. Mercury and rhenium atoms have tetrahedral
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) Å, 2.7028(3)–2.9163(3) Å, and 1.693(3)–1.744(3) Å, respectively. Antimony atoms in
two crystallographically independent trinuclear centrosymmetric [Sb₃I₁₂]^2– anions of complex III have an octa-
hedral environment. Each terminal SbI₃ fragment (Sb–I_t, 2.8265(9)–2.8333(10) Å) is bound to the central atom
through tree bridging iodine atoms (Sb(2)–I_br, 3.2275(9)–3.3620(10) Å). The distances between the central Sb
atom and bridging iodine atoms are much shorter (Sb(1)–I_br, 3.0153(6)–3.0316(6) Å; Sb(3)–I_br, 2.9926(6)–
3.0074(6) Å).

DOI: 10.1134/S0036023610071010

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