Structures of three glycine-bridged polymeric complexes: [Mn(glycine)(H2O)2Cl2], [Co(glycine)(H2O)2Cl2] and [Co(glycine)(H2O)4](NO3)2

Clegg, William; Lacy, Oi Mi; Straughan, B. P.

doi:10.1107/s0108270187094058

Cited by 17 publications

(15 citation statements)

References 4 publications

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“…Interestingly, the structure of GlycineMnCl 2 Á 2 H 2 O [34] seems identical with the one described above at first glance. The chains are indeed topologically identical, but the unit cell is doubled in the c direction and the space group is P2 1 /c instead of P2 1 .…”

Section: Isolated Polyhedra (0-0)supporting

confidence: 62%

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Compounds of glycine with halogen or metal halogenides: review and comparison

Fleck¹

2008

Zeitschrift Für Kristallographie - Crystalline Materials

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Glycine / Metal halogenids / Crystal structure / Comparison / ConnectivityAbstract. The large family of glycine halogenides and metal halogenides encompasses a high variety of different crystal structures. The role of the glycine molecule as a structural unit as a mono-, bi-or tridentate ligand, of the halogenide ions as well as the composition and condensation of the cationic polyhedra is discussed. With respect to the connectivity of the building units, five different structure families of glycine halogenides and glycine-metal halogenides can be distinguished. Parameters such as symmetry, ionic radii, electronegativity of cation and anion and their difference, charge, coordination number, hydration states, stoichiometric ratios and connectivity were weighed against each other in order to see if any correlations exist. The data suggest that cations with high electronegativities seem to promote formation of structures with a low grade of connectivity, i.e., isolated units, and vice versa.

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Section: Isolated Polyhedra (0-0)supporting

confidence: 62%

“…(0-1)-infinite chains in glycine-metal halogenides (glycinemetal-ration 1 : 1): Glycine 2 NiCl 2 Á 2 H 2 O[33] and Glycine 2 MnCl 2 Á 2 H 2 O[34] have topologically identical chains (a), only the relative position of neighbouring chains differs (seeFig. 6).…”

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confidence: 99%

Compounds of glycine with halogen or metal halogenides: review and comparison

Fleck¹

2008

Zeitschrift Für Kristallographie - Crystalline Materials

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“…This very high structural diversity reflects the flexibility of glycine as ligand, as it proves that different packing arrangements with comparable lattice energies are possible. Nevertheless, isotypic structures occur, as, e.g., the 1:1 glycine salts of bivalent manganese and cobalt (Mrozek et al 1999a;Clegg et al 1987) or the 2:1 glycine salts of cobalt and nickel (Stenzel and Fleck 2004;Ch'ng et al 2008). The structure of the latter pair is layered: Because of the higher ratio of glycine, the octahedra are linked via two amino acids to each other (Fig.…”

Section: Glycine Metal Halogenidesmentioning

confidence: 96%

“…These crystals were grown by means of the slow evaporation method and were then cut and polished to prepare samples for the measurement of direction-dependent physical properties, e.g., refractive indices or components of the dielectric and piezoelectric tensors One more example of a system with more than one phase is that of glycine-Mn 2+ -Cl-H 2 O. Four different species were identified in this system: Three phases consist of glycine and MnCl 2 in equimolar ratios and one anhydrous crystal (Narayanan and Venkataraman 1975) and two different dihydrates (one determined by Clegg et al 1987 and then refined by Ciunik and Glowiak 1980a, the other one published by Mrozek et al 1999a), all of which comprise chain structures. The chains are topologically identical; still the structure is different (Fig.…”

Section: Glycine Metal Halogenidesmentioning

confidence: 99%

Compounds of Amino Acids and Neutral Salts

Fleck

Petrosyan

2014

Salts of Amino Acids

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In this chapter we present salts composed of amino acids combined with inorganic cations and anions. These salts generally contain amino acids in neutral, i.e., zwitterionic form, with the charges balanced by the cations and anions. However, some of the phases resented here contain cations, anions, and amino acids, but the amino acids are not in neutral form, as, e.g., glycinate À Cu, but for reasons of similarity, they are included in this chapter. The variation of salts (and thus the number of species) is even greater as for salts of amino acids and cations, as a multitude of combinations of amino acids, cations, and anions is possible. Additionally, different hydration states are often found, as well as different ratios of components. Thus, there are several instances of systems containing more than one phase (e.g., the system glycine-zinc-chloride-water). Despite the greater variation, many coordination patterns found in the salts described in the previous chapter recur in the salts reported here. Likewise, the connectivities of units are similar as those found in salts of amino acids and cations. Instances of materials with noteworthy physical properties are presented. Keywords Introducing RemarksAs stated before, this chapter deals with salts of amino acids and neutral, inorganic salts. In these species, the amino acid usually exists in zwitterionic form, but it is still coordinated to a cation. As other anions are present, the amino acids are not the only possible ligands. These anions can act as additional ligands (plus possible water molecules as well). Moreover, in some cases the inorganic anions are not part of the coordination spheres, but located in the interstices between units composed of cations and coordinating amino acids.M. Fleck and A.M. Petrosyan, Salts of Amino Acids: Crystallization, Structure and Properties,

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“…这与钴 [67] 和镍 [68] 配合物是同构的, 证明了主族金属配合物确实具有与过渡金属配合物相似的性质与结构, 如果进行深入研究, 明确它们的异同, 就有可能实现主族金属与过渡金属的可控替换, 扩大它们的应用范围.…”

Section: 同年unclassified

Advances in Crystallography of Coordination Complexes on Main Group Metals with Amino Acid Ligands

Dong¹,

Zheng²,

Zhou³

et al. 2014

Acta Chim. Sinica

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The study of main-group metal elements and their coordination complexes with amino acids is an important theme in coordination chemistry, but it has often been overshadowed by the intense interest in transition-metal coordination complexes. In recent years, there has been a growing interest in main-group compounds, extending across all members of sand p-blocks in the Period Table, which has resulted in the discovery of numerous new classes of compounds with previously unknown structures and bonding. Among these achievements, the coordination complexes of main group metals with amino acid ligands are especially notable. As a kind of functional ligand, amino acids set up a bridge of interdisciplinary subjects between coordination chemistry and biology. The research on coordination chemistry of main group metals with amino acid ligands will benefit to understanding of the biological effects of main group metals; developing new medicine; designing and synthesizing functional and environmental friendly materials. To achieve these targets, the structural information of these new coordination complexes is very important and it provides fundamental knowledge for more extensive investigation in the future. Therefore, this review focus on the single crystal structures of the coordination complexes of main group metals with amino acid ligands based on X-ray crystallography. Literature coverage is around the last 15 years and ends to May 2013 although some older works are also included for comparing. Specially, this article has been written to commemorate 2014 the International Year of Crystallography declared by United Nations.

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Structures of three glycine-bridged polymeric complexes: [Mn(glycine)(H2O)2Cl2], [Co(glycine)(H2O)2Cl2] and [Co(glycine)(H2O)4](NO3)2

Cited by 17 publications

References 4 publications

Compounds of glycine with halogen or metal halogenides: review and comparison

Compounds of glycine with halogen or metal halogenides: review and comparison

Compounds of Amino Acids and Neutral Salts

Advances in Crystallography of Coordination Complexes on Main Group Metals with Amino Acid Ligands

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