Stereochemistry of carboxylate complexes. Crystal structure of (-)598-malatodiaquomanganese(II) hydrate

The structure of trans-diaquabis[(±)-hydrogen malato]cobalt(II) dihydrate

“…The dimensions of the malate moiety resemble those found in previous investigations (Karipides & Reed, 1976;Versichel, Van de Mieroop & Lenstra, 1978;Karipides, 1979;Lenstra & Van Havere, 1980). However, of more particular interest is the comparison of structural features in the title compound with malate-Co 2+ coordination in the neutral salt, cobalt S-malate trihydrate (Kryger & Rasmussen, 1972).…”

“…In the racemic cobalt hydrogen malate the ligand conformation, which is specified by the dihedral angle C(1)-C(2)-C(3)-C(4) of-174.0 ° (Table 3), is antiperiplanar, which differs sharply from the synclinal conformation (dihedral angle -64.8 °) in cobalt Smalate (Kryger & Rasmussen, 1972: Testa, 1979. This difference results because the fl-carboxylate group in cobalt S-malate is also coordinated to the Co z+ ion and the synclinal conformation is favored for tridentate malate coordination (Karipides & Reed, 1976). The five-membered chelate ring Co-O(1)-C(1)-C(2)-0(3) in the acid malate salt is considerably closer to planarity than the corresponding extensively buckled ring in the neutral salt.…”

Structure of manganese(II) glycolate dihydrate

“…There is also a tendency for the 0(3) or 0(6) hydroxy atoms to lie in this plane. Similar trends have been noted in other structures containing the glycolate moiety (Goli~ & Speakman, 1965;Colton & Henn, 1965;Johnson, Gabe, Taylor & Rose, 1965;Fischinger & Webb, 1969;Prout et al, 1968;Ellison, Johnson & Levy, 1971;Pijper, 1971) as well as in other hydroxycarboxylate salts of Mn II, such as citrate (Carrell & Glusker, 1973), malate (Karipides & Reed, 1976) and gluconate (Lis, 1979). The conformational phenomena of a-hydroxycarbonyl systems have been investigated by Newton & Jeffrey (1977) using ab initio molecular-orbital theory.…”

Characterization of foliar manganese (Mn) in Mn (hyper)accumulators using X‐ray absorption spectroscopy

“…, 2008), where it has been proposed that Ni is coordinated by the two carboxyl groups and the alcohol group of malate (Strathmann & Myneni, 2004). However, it has been suggested (Karipides & Reed, 1976) that coordination of Mn by malate is via only one carboxyl group, which would therefore provide a second shell CN of 2 in the G. bidwilli samples. The CN and average Mn–C bond distance determined here were therefore similar to those reported by Karipides & Reed (1976) (e.g.…”

“…However, it has been suggested (Karipides & Reed, 1976) that coordination of Mn by malate is via only one carboxyl group, which would therefore provide a second shell CN of 2 in the G. bidwilli samples. The CN and average Mn–C bond distance determined here were therefore similar to those reported by Karipides & Reed (1976) (e.g. average Mn–C bond distance = 3.06 Å and CN = 2).…”