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Min Zhang

Bio: Min Zhang is an academic researcher from Hunan University of Science and Engineering. The author has contributed to research in topics: Crystal structure & Iodide. The author has an hindex of 5, co-authored 38 publications receiving 65 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the reaction of a racemic four-coordinate Ni(II) complex [Ni(rac-L)](ClO4)2 with l- and d-alanine in acetonitrile/water gave two sixcoordinate enantiomers formulated as Ni(RR-L)(l-Ala) and ClO4·2CH3CN, respectively.
Abstract: The reactions of a racemic four-coordinate Ni(II) complex [Ni(rac-L)](ClO4)2 with l- and d-alanine in acetonitrile/water gave two six-coordinate enantiomers formulated as [Ni(RR-L)(l-Ala)](ClO4)·2CH3CN (1) and [Ni(SS-L)(d-Ala)](ClO4) (2) (L = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclo-tetradecane, Ala− = alanine anion), respectively. Evaporation from the remaining solutions gave two four-coordinate enantiomers characterized as [Ni(SS-L)](ClO4)2 (S-3) and [Ni(RR-L)](ClO4)2 (R-3), respectively. Single-crystal X-ray diffraction analyses of complexes 1 and 2 revealed that the Ni(II) atom has a distorted octahedral coordination geometry, being coordinated by four nitrogen atoms of L in a folded configuration, plus one carboxylate oxygen atom and one nitrogen atom of l- or d-Ala− in mutually cis-positions. Complexes 1 and 2 are supramolecular stereoisomers, constructed via hydrogen bonding between [Ni(RR-L)(l-Ala)]+ or [Ni(SS-L)(d-Ala)]+ monomers to form 1D hydrogen-bonded zigzag chains. The homochiral natures of complexes 1 and 2 have been confirmed by CD spectroscopy.

8 citations

Journal ArticleDOI
TL;DR: In this paper, a monoclinic C2/c (no. 15), a = 35.310 A, b = 5.9993 A, c = 22.7422 A, = 98.692(4)°, V = 4762.3 A, Z = 16, Rgt(F) = 0.0397, wRref(F ) = 0.1048, T = 153 K.
Abstract: C12H13ClO4, monoclinic, C2/c (no. 15), a = 35.310(2) A, b = 5.9993(2) A, c = 22.7422(8) A, = 98.692(4)°, V = 4762.3 A, Z = 16, Rgt(F) = 0.0397, wRref(F ) = 0.1048, T = 153 K.

7 citations

Journal ArticleDOI
TL;DR: In the title compound, C12H13ClO4, the 1,3-dioxane ring adopts a chair conformation and the 2-chlorobenzene and methyl substituents occupy equatorial sites and the carboxyl group is in an axial inclination.
Abstract: In the title compound, C12H13ClO4, the 1,3-dioxane ring adopts a chair conformation and the 2-chloro­benzene and methyl substituents occupy equatorial sites. The carboxyl group is in an axial inclination. In the crystal, carb­oxy­lic acid inversion dimers linked by pairs of O—H⋯O hydrogen bonds generate R22(8) loops.

6 citations

Journal ArticleDOI
TL;DR: The Ni atom in the title salt, [Ni(C7H5O2)(C16H36N4)]ClO4·H2O, is in a six-coordinate octahedral geometry.
Abstract: The Ni atom in the title salt, [Ni(C7H5O2)(C16H36N4)]ClO4·H2O, is in a six-coordinate octa­hedral geometry. The metal atom is chelated by the carboxyl­ate group, and the macrocyclic ligand adopts a folded configuration. The cation, anion and water mol­ecules engage in hydrogen bonding to form a layer structure.

5 citations

Journal ArticleDOI
TL;DR: In this article, the title compound, [Co(C4H13N3)2][Co(CN)6]·2H2O, comprises one Co(dien)2]3+ cation (dien is diethyl-ene-triamine), one [Co6]3− anion and two water molecules.
Abstract: The title compound, [Co(C4H13N3)2][Co(CN)6]·2H2O, comprises one [Co(dien)2]3+ cation (dien is diethyl­ene­triamine), one [Co(CN)6]3− anion and two water molecules. The Co3+ atom of the [Co(dien)2]3+ cation is six-coordinated by six N atoms from two diethyl­enetriamine groups. The Co3+ atom of the [Co(CN)6]3− anion is six-coordinated by six C atoms from six cyanide ions. Neighboring cations and anions are connected by hydrogen bonds to each other and to the water molecules. The metal atoms lie on inversion sites.

5 citations


Cited by
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Journal ArticleDOI
10 Mar 1970

8,159 citations

Journal ArticleDOI
TL;DR: The accuracy of a dispersion-corrected density functional theory method is validated against 241 experimental organic crystal structures from Acta Cryst.
Abstract: This paper describes the validation of a dispersion-corrected density functional theory (d-DFT) method for the purpose of assessing the correctness of experimental organic crystal structures and enhancing the information content of purely experimental data. 241 experimental organic crystal structures from the August 2008 issue of Acta Cryst. Section E were energy-minimized in full, including unit-cell parameters. The differences between the experimental and the minimized crystal structures were subjected to statistical analysis. The r.m.s. Cartesian displacement excluding H atoms upon energy minimization with flexible unit-cell parameters is selected as a pertinent indicator of the correctness of a crystal structure. All 241 experimental crystal structures are reproduced very well: the average r.m.s. Cartesian displacement for the 241 crystal structures, including 16 disordered structures, is only 0.095 A (0.084 A for the 225 ordered structures). R.m.s. Cartesian displacements above 0.25 A either indicate incorrect experimental crystal structures or reveal interesting structural features such as exceptionally large temperature effects, incorrectly modelled disorder or symmetry breaking H atoms. After validation, the method is applied to nine examples that are known to be ambiguous or subtly incorrect.

159 citations

Book
01 Jan 2013
TL;DR: The history of the Church at Leiper's Fork, now known as Hillsboro, TN, has been discussed in this article, where it is suggested that it would be encouraging to the congregation if its history would be kept fresh in the minds of its members.
Abstract: There are very few people who have lived the allotted time but have an interesting biography, and there are very few congregations but have a very profitable history. The church at Leiper’s Fork, now known as Hillsboro, TN, has a most interesting history. There are few, if any, who know the history of their congregation. It seems that it would be encouraging to the congregation if its history would be kept fresh in the minds of its members.

47 citations

Journal ArticleDOI
TL;DR: Stability of the molecule arising from hyper conjugative interaction and charge transfer delocalization has been analyzed using natural bond orbital (NBO) analysis and electrophilic and nucleophilic descriptors of the title molecule have been calculated.

13 citations

Journal ArticleDOI
TL;DR: The title complex, [CoCl(C5H13N)(C2H8N2)2]Cl2·H2O, comprises one chloridobis(ethylenediamine)(n-pentylamine)cobalt(III) cation, two chloride counter-anions and a water molecule.
Abstract: The title complex, [CoCl(C5H13N)(C2H8N2)2]Cl2·H2O, comprises one chloridobis(ethyl­enediamine)(n-pentyl­amine)cobalt(III) cation, two chloride counter-anions and a water mol­ecule. The CoIII atom of the complex is hexa­coordinated by five N and one Cl atoms. The five N atoms are from two chelating ethyl­enediamine and one n-pentyl­amine ligands. Neighbouring cations and anions are connected by N—H⋯Cl and N—H⋯O hydrogen bonds to each other and also to the water mol­ecule.

13 citations