Pyridiniumtrans-diaquabis[oxalato(2−)-κ²O¹,O²]chromate(III) urea monosolvate

Abstract

Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.003 Å; R factor = 0.041; wR factor = 0.111; data-to-parameter ratio = 17.8.The asymmetric unit of the title solvated molecular salt, (C 5

A Novel Chromium(III) Hybrid Salt, Triethylammonium <i>Trans</i>-Diaquabis(Oxalato-<i>κ</i><sup>2</sup>O<sup>1</sup>,O<sup>2</sup>) Chromate(III), (C<SUB>6</SUB>H<SUB>16</SUB>N)[Cr(C<SUB>2</SUB>O<SUB>4</SUB>)<SUB>2</SUB>(H<S

“…− anionic molecular building block shows a slightly distorted (4 + 2) octahedral coordination of the central metal (Cr III ) by four equatorial O atoms (O1, O1 i , O4, O4 i , i = −x + 1, −y + 1, −z + 1) of two coplanar oxalate and two axial O atoms (O1w, O1w i ) of aqua ligands. The four Cr-O(ox) distances that range from 1.9630(9) to 1.9729(9) Å are somewhat slightly shorter than Cr-O(water) ones: 2.0041(11) Å (Table 2) but comparable to those reported hitherto in similar compounds [11] [14] [26].…”

Crystal structure of 4-(dimethylamino)pyridiniumcis-diaquabis(oxalato-κ2O,O′)ferrate(III) hemihydrate

“…In this context, the bis-oxalato complexes of transition metals, [M III (C 2 O 4 ) 2 (H 2 O) 2 ] À , are extremely versatile building blocks for the synthesis of organic-inorganic hybrid salts. Although several salts of general formula A[M III (C 2 O 4 ) 2 (H 2 O) 2 ]ÁxH 2 O (A + = aromatic iminium cation, 0 x 1) have been explored to date (Bé lombé et al, 2009;Nenwa et al, 2010;Ché rif et al, 2011;Ché rif, Abdelhak et al, 2012;Nenwa et al, 2012a,b;Dridi et al, 2013;Bebga et al, 2013), the predictable and consistent formation of networks is still in its infancy. In most cases, the network topologies are influenced by the organic counter-cations, metal coordination spheres, pH values, guest molecules and the crystallization solvent.…”