The title compound [systematic name: (S)-1,3-dicarboxypropanaminium chloride], C5H10NO4
+·Cl−, has been investigated previously by Dawson [Acta Cryst. (1953). 6, 81–83], with R = 0.106 and without the location of H atoms, and then by Sequeira, Rajagopal & Chidambaram [Acta Cryst. (1972). B28, 2514–2519] using neutron diffraction with R = 0.043. The present determination at 153 K has R = 0.017 and all the H atoms are located. There are obvious differences in some C—C bond lengths between the present and previous studies. In the present structure, l-glutamic acid is protonated and is linked to the Cl− anion by an O—H⋯Cl hydrogen bond. The crystal structure is established by a three-dimensional network of O—H⋯O, N—H⋯O and N—H⋯Cl hydrogen bonds.
The bimetallic title complex, [CuFe(CN)(5)(C(12)H(30)N(6)O(2))(NO)] or [Cu(L)Fe(CN)(5)(NO)] [where L is 1,8-bis(2-hydroxyethyl)-1,3,6,8,10,13-hexaazacyclotetradecane], has a one-dimensional zigzag polymeric -Cu(L)-NC-Fe(NO)(CN)(3)-CN-Cu(L)- chain, in which the Cu(II) and Fe(II) centres are linked by two CN groups. In the complex, the Cu(II) ion is coordinated by four N atoms from the L ligand [Cu-N(L) = 1.999 (2)-2.016 (2) A] and two cyanide N atoms [Cu-N = 2.383 (2) and 2.902 (3) A], and has an elongated octahedral geometry. The Fe(II) centre is in a distorted octahedral environment, with Fe-N(nitroso) = 1.656 (2) A and Fe-C(CN) = 1.938 (3)-1.948 (3) A. The one-dimensional zigzag chains are linked to form a three-dimensional network via N-H.N and O-H.N hydrogen bonds.
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