32 research outputs found
(4S,5S)-4,5-Bis(3-cyclohexyl-2-thioxobenzimidazol-1-ylmethyl)-2,2-dimethyl-1,3-dioxolane from synchrotron radiation
(CN3H6) 2.Zn4H5(PO4) 5 , a New Layered Guanidinium Zinc Phosphate built up from 3-, 4-, and 8-ring units
Lone-pair containment in closed cavities. The MT<sub>e6</sub>O<sub>13</sub> (M = Mn, Ni, Co) family of ternary oxides
The hydrothermal and ceramic syntheses, single crystal structures and some properties of MnTe6O13, NiTe6O13 and CoTe6O13, are described. These isostructural phases [space group R (3) over bar (No. 148) with a approximate to 10.2 Angstrom and c approximate to 19 Angstrom] contain a dense network of isolated MO6 (M = Mn, Ni, Co) octahedra, TeO4 folded squares and distorted TeO4+1 square-based pyramids, sharing vertices and edges by way of M-O-Te and Te-O-Te bonds. The Te-IV lone pairs are directed into closed cavities formed from 18 Te-centred and 6 MO6 groupings. Magnetic susceptibility data for MnTe6O13, and CoTe6O13 show antiferromagnetic ordering at ca. 13 and 21 K, respectively, which must occur via a superexchange pathway.</p