catena-Poly[[[{5,5′-dimethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}manganese(III)]-μ-acetato] methanol monosolvate]

Abstract

The title MnIII compound, {[Mn(C18H18N2O4)(CH3COO)]·CH3OH}n, was synthesized by a reaction between mangan­ese(II) acetate and ethyl­enebis(4-meth­oxy­salicylaldimine). The structure is made up of bis­(4-meth­oxy­salicyldene)ethyl­enediaminatomanganese(III) units bridged by acetate groups, with Mn—N = 1.9786 (9), Mn—O = 1.8784 (10) and Mn—Oacetate = 2.056 (9) and 2.2571 (9) Å, forming a one dimensional polymer (–Mn–acetate–Mn–acetate–) along [100]. The MnIII atom is in a Jahn–Teller-distorted octa­hedral environment with cis angles ranging from 81.87 (4) to 96.53 (4)° and trans angles ranging from 166.11 (3) to 173.93 (3)°. The methanol solvent mol­ecule is hydrogen bonded to the phenolate O atom. In addition to this classical hydrogen bond, there are weak C—H⋯O inter­actions. The structure was determined from a crystal twinned by pseudo-merohedry.

Local structure study of the orbital order/disorder transition inLaMnO3

“…55. Though unexpected for LaMnO 3 , this model is actually related to the ordered JT distortion known to occur in some Mn 3+ brownmillerites, [56][57][58] and so could not be dismissed out of hand.…”

“…And, second, of the two models with different orbital arrangements to that of the ordered phase, it is the 3SP-type arrangement that contains the more conventional local JT distortion of MnO 6 octahedra. While the off-centered distortion of the L-type model is not without precedent in the structural chemistry of manganites, [56][57][58] the 180 • arrangement of long Mn-O bonds is unquestionably the more frequently observed JT distortion for octahedral Mn 3+ . 33…”

Organophosphine/phosphite‐stabilized silver(I) complexes bearing N‐hydroxysuccinimide ligand: synthesis, solid state structure and their potential use as MOCVD precursors

“…Hydrogen bonds display an almost continuous distribution of O···O distance between 2.36 and 3.69 Å and have been subdivided into classes which are referred to us as 'very strong' (<2.5 Å), 'strong' (2.5–2.65 Å), 'medium' (2.65–2.80 Å), or 'weak' (>2.80 Å) . For complex 2b , the oxygen–oxygen distance is 2.791(4) Å and can be considered as 'medium', which is also typical for Mn(III) compound {[Mn(C 18 H 18 N 2 O 4 )(CH 3 COO)]⋅CH 3 OH} n (d o–o = 2.848 (2) Å) …”

“…Hydrogen bonds display an almost continuous distribution of OÁÁÁO distance between 2.36 and 3.69 Å and have been subdivided into classes which are referred to us as 'very strong' (<2.5 Å), 'strong' (2.5-2.65 Å), 'medium' (2.65-2.80 Å), or 'weak' (>2.80 Å). [33] For complex 2b, the oxygen-oxygen distance is 2.791(4) Å and can be considered as 'medium', which is also typical for Mn(III) compound {[Mn (C 18 [34] The Ag-P distances [2.410 (9), 2.440 (10) Å] are close to the sum of covalent radio of P and Ag atoms (2.44 Å) [35] and shorter than that of [(R 3 P) 2 AgPI] (PI = C 8 H 4 NO 2 ) [2.4944(7) Å]. [36] The angles of P-Ag-P [135.…”

Two new mononuclear manganese(III) salen complexes

“…Four structures are polymeric; the acetate ligand plays a bridging role in all of them. [18][19][20][21] The dinuclear structure of the coordination species has been observed in five compounds. [22][23][24][25][26] Acetate acts as a bridging ligand in four of them, while in one of the dimers phenolate oxygen of a substituted salen ligand serves as bridge between the two Mn(III) centers and the acetate is coordinated as a terminal ligand.…”