Anti-electrostatic hydrogen-bonded tellurate dimers captured and stabilized by crystallization of a bis-iminoguanidinium salt

被引：0

作者：

Einkauf, Jeffrey D. ^{[1
]}

Bryantsev, Vyacheslav S. ^{[1
]}

Custelcean, Radu ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37831 USA

来源：

POLYHEDRON | 2022年 / 223卷

关键词：

Guanidine; Crystallization; Oxyanions; Tellurium; Tellurate; BASIS-SETS; RECOGNITION; SEPARATION;

D O I：

10.1016/j.poly.2022.115990

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Anionic Te2O6(OH)(4)(4-) dimers have been captured by crystallization of a hydrated salt of glyoxal-bis-iminoguanidinium (GBIG), and structurally characterized by single-crystal X-ray diffraction and vibrational spectroscopy. The crystal structure reveals anti-electrostatic hydrogen-bonded chains of Te2O6(OH)(4)(4-) dimers, consisting of edge-sharing TeO6 octahedra, stabilized by hydrogen bonding from the GBIG cations and the water molecules included in the crystal. FTIR spectroscopy confirms the presence of TeO6 octahedra with characteristic Te-O stretching modes at 755 cm(-1) and 689 cm(-1), while the observed stretching mode at 3459 cm(-1) confirms the presence of axially-bonded hydroxyl groups. Raman spectroscopy and DFT calculations confirm the presence of the Te2O6(OH)(4)(4-) dimers in the crystalline phase and of the TeO(OH)(5)(-) monomers in solution.

引用

页数：7