146344-60-7Relevant articles and documents
Synthesis and structures of polar coordination polymers: [(SALEN)MnO2CCH2D-B:]n (D = NH, S; -B: = 4-pyridyl, 4-cyanophenyl)
Chiang, William,Ho, Douglas M.,Van Engen, Donna,Thompson, Mark E.
, p. 2886 - 2893 (2008/10/08)
Reaction between [N,N′-ethylenebis(salicylaldiminato)]manganese(III) bromide (Mn(SALEN)Br) and N-4-pyridylglycine gives Mn(SALEN)(N-4-pyridylglycinate) (1), which crystallizes as an infinite-chain coordination polymer. The polymer chains consist of metal centers bridged by 4-pyridylglycinate ligands. The Mn atoms are octahedrally coordinated with the SALEN ligand filling four equatorial sites, a carboxylate oxygen occupying one axial site, and a pyridyl nitrogen of an adjacent molecule occupying a trans axial site. This bonding pattern is repeated to give a polymer with head-to-tail alignment along the backbone. The reaction between Mn(SALEN)Br and (4-pyridylthio)acetic acid gives the compound Mn(SALEN)((4-pyridylthio)acetate) (2), with a polymeric structure in the solid state very similar to that of 1. 1, C24H27MnN4O6, crystallizes in the monoclinic space group P21/c with a = 10.782(2) ?, b = 18.100(6) ?, c = 12.886(4) ?, β = 105.22(2)°, and Z = 4. 2, C23H22MnN3O5S, crystallizes in the monoclinic space group P21/c with a = 10.670(1) ?, b = 17.754(3) ?, c = 12.714(2) ?, β = 108.78(1)°, and Z = 4. In contrast, the reaction of Mn(SALEN)Br with N-(4-cyanophenyl)glycine gives 3, whose crystal structure consists of a mixture of the monomeric (H2O)Mn(SALEN)(N-(4-cyanophenyl)glycinate) and a Mn(SALEN)(N-(4-cyanophenyl)glycinate) polymer. This polymer consists of adjacent Mn(SALEN) moieties bridged by a single carboxylate unit in a syn-anti conformation; thus no head-to-tail alignment is observed along the backbone. 3, C25H21MnN4O4·C 25H23MnN4O5, crystallizes in the monoclinic space group P21/n, with a = 14.295(4) ?, b = 11.614(4) ?, c = 27.220(7) ?, β = 90.20(2)°, and Z = 4.
