scholarly journals Novel Coordination Polymer of Cadmium (II) with L-Tryptophan

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2266 ◽  
Author(s):  
Agnieszka Czylkowska ◽  
Małgorzata Szczesio ◽  
Anna Pietrzak ◽  
Anita Raducka ◽  
Bartłomiej Rogalewicz
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Organic Ligand ◽  
Amino Group ◽  
Carboxylate Group ◽  
Cadmium Atom ◽  
Slow Evaporation ◽  
Supramolecular Chains ◽  
Polymeric Coordination ◽  
Oxygen Atoms

A new cadmium (II) polymeric coordination compound with tryptophan (Trp) of general formula {[Cd(L-Trp)2(H2O)Cl]∙(Trp)∙(H2O)}n was synthesized. The monocrystals of the investigated complex were obtained using the method of slow evaporation. The crystal and molecular structure was determined. The compound was crystallized in the orthorhombic P212121 space group. The cadmium atom was seven coordinates by two oxygen atoms from one bidentate-chelating carboxylate group of bridging Trp, two oxygen atoms from one bidentate-chelating carboxylate group from a monodentate organic ligand, one oxygen atom of water molecule, one nitrogen atom of the amino group from bridging Trp and one chlorine atom, which means that every tridentate Trp substituent was bridging towards one cadmium atom and bidentate chelating towards one another. The monodentate Trp is a zwitterionic molecule. The coordination led to the formation of 1D supramolecular chains entrapping water and Trp molecules.

Crystal and molecular structure of di-o-anisylketone

1985 ◽  
Vol 63 (12) ◽  
pp. 3374-3377 ◽  
Author(s):  
C. Faerman ◽  
S. C. Nyburg ◽  
G. Punte ◽  
B. E. Rivero ◽  
A. A. Vitale ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Title Compound ◽  
Crystal And Molecular Structure ◽  
Monoclinic Space Group ◽  
Space Group ◽  
Compound C ◽  
Twist Conformation ◽  
Oxygen Atoms

The crystal and molecular structure of the title compound, C15H14O3, is described. Crystals are monoclinic, space group P21/n, a = 9.893(5), b = 10.719(5), c = 12.136(3) Å, β = 90.56(3)°. The molecule has a twist conformation and interactions between oxygen atoms of the methoxyl groups are thought to play some part in this.

Crystal and Molecular Structure of 3-Iodo-2-propynyl-N-butylcarbamate

1997 ◽  
Vol 52 (2) ◽  
pp. 256-258 ◽  
Author(s):  
Evgeni V. Avtomonov ◽  
Rainer Grüning ◽  
Jörg Lorberth
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Title Compound ◽  
Crystal And Molecular Structure ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dimensional Network ◽  
Carbamate Group ◽  
Oxygen Atoms

Abstract The crystal structure of the title compound has been determined by X-ray diffraction methods. Due to the Lewis acidic character of the iodine substituent a “zig-zag” chain is formed via intermolecular interactions (2.933(4) A) between iodine and oxygen atoms of theocarbamate moiety. A three-dimensional network is formed through hydrogen-bridging (2.04 A) between NH-groups and the oxygen atoms of the neighbouring carbamate group of the next molecule.

Synthesis, IR and X-Ray Studies of Tetra(N,N′-tetraethyl-N″-benzoyl- phosphorictriamide)-tetra(μ-3-methoxo)-tetra(methanol)tetra-NickeI(II)

1998 ◽  
Vol 53 (8) ◽  
pp. 836-840 ◽  
Author(s):  
Vladimir A. Ovchynnikov ◽  
Vladimir M. Amirkhanov ◽  
Anatoliy A. Kapshuk ◽  
Tatyana Yu. Sliva ◽  
Tadeusz Glowiak ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Oxygen Atom ◽  
Metal Ion ◽  
Crystal And Molecular Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Octahedral Environment ◽  
Distorted Octahedral ◽  
Methoxy Groups ◽  
Oxygen Atoms

Abstract A new nickel(II) complex with N,N′-tetraethyl-N″-benzoylphosphortriamide (HL = C6H5C(O)N(H)P(O)(NEt2)2) of composition Ni4L4(OCH3)4·(HOCH3)4 (1) has been synthe­ sized. The crystal and molecular structure of 1 has been determined from the X-Ray diffraction data (tetragonal, space group P4̄21c with a = 17.000(2) Å, c = 15.338(3) Å, Z = 2; R = 0.0399 for 1412 unique reflections). The structure is made up of cubane-like tetramers. In the corners of a cube there are 4 atoms of nickel and 4 atoms of oxygen of methoxy groups. The nickel atoms are characterized by a slightly distorted octahedral environment, which consists of three oxygen atoms of methoxy groups, carbonylic and phosphorylic oxygen atoms of the ligand L-, and an oxygen atom of a methanol molecule. The ligands L- coordinate to the metal ion forming a chelate via the oxygen atoms of carbonylic and phosphorylic groups.

The Crystal and Molecular Structure of catena-{Aquabis[2-methyl-2-(phenylthio)-propanoato]cadmium(II) monohydrate}

1988 ◽  
Vol 41 (11) ◽  
pp. 1769 ◽  
Author(s):  
G Smith ◽  
EJ Oreilly ◽  
CHL Kennard ◽  
TCW Mak ◽  
WH Yip ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Crystal And Molecular Structure ◽  
Chelate Ring ◽  
Propanoic Acid ◽  
Cadmium Complex ◽  
Carboxylate Group ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Carboxylate Groups

The crystal structure of the cadmium complex of 2-methyl-2-(phenylthio) propanoic acid, [ Cd (C6H5SC(CH3)2CO2)2(H2O)]. H2O has been determined by X-ray diffration and refined to a residual R 0.051 for 2725 observed reflections. Crystals are orthorhombic, space group Pbca with a 10.819(2), b 9.030(1), c 47.24(2) A and Z 8. The stereochemistry about cadmium is distorted MO6S seven-coordinate with Cd -S 2.747(2)Ǻ and a Cd -O range 2.277-2.491(5)Ǻ. Bonds are from cadmium to a water, and to four oxygens from two bidentate carboxylate groups, one of which also forms a polymer link. The same carboxylate group is also involved in a five- membered (S,O) chelate ring.

The Crystal and Molecular Structure of Bis-[μ-2-(p-nitrophenyliminomethyl)phenolato-N,O]-bis(ethanol)bis(nitrato-O,O')dinickel(II), [Ni(slno)NO3(C2H5OH)]2, a Binuclear Ferromagnetic Salicylaldimine Derivative of Nickel Nitrate

1979 ◽  
Vol 32 (2) ◽  
pp. 331 ◽  
Author(s):  
RJ Butcher ◽  
E Sinn
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Nickel Atom ◽  
Nickel Nitrate ◽  
Distorted Octahedral Geometry ◽  
Tetrahedral Geometry ◽  
Imine Group ◽  
Phenolic Oxygen ◽  
Distorted Octahedral ◽  
Oxygen Atoms

The crystal and molecular structure of the complex bis-[μ-2-(p-nitrophenyliminomethyl)phenolato- N,O]-bis(ethanol)bis(nitrato-O,O')dinickel(11) and its magnetic properties are reported. Crystal data: space group PI, Z 1, a 8.882(2), b 9.332(3), c 12.533(4) �, α 94.40(2),B 109.99(2), γ 111.61(2)�, U 883 �3, R 2.8%, Rw 3.3% for 2154 reflections. The compound is prepared from the reaction of bis(N-p-nitrophenylsalicylaldimine)nickel(II) with nickel nitrate in hot triethoxymethane, and on cooling the solution deposited pale green transparent crystals. The structure contains neutral dimeric units with bridging through the phenolic oxygen atoms and has distorted octahedral geometry about each crystallographically identical nickel atom. The six donor atoms are made up of two oxygen atoms from the bidentate nitrate, oxygen from ethanol, nitrogen from the imine group and two bridging phenolic oxygen atoms. The Ni2O2 group is strictly planar possessing a crystallographic centre of symmetry. The angles subtended at the bridging oxygen atoms indicate a tetrahedral geometry and it is demonstrated that this is important in explaining the ferromagnetic intradimer interaction. The presence of hydrogen bonding between the ethanol hydrogen and the nitrate group of an adjacent molecule appears to be an important stabilizing factor in determining the structure and provides a possible pathway for the antiferromagnetic interdimer exchange interaction.

Crystal and Molecular Structure of 1,11-bis(Tropolone)-3,6,9-trioxaundecane · RbI

1980 ◽  
Vol 35 (12) ◽  
pp. 1533-1537 ◽  
Author(s):  
K. K. Chacko ◽  
W. Saenger
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Type Structure ◽  
The Other ◽  
Space Group ◽  
X Ray ◽  
Circular Structure ◽  
Cell Dimensions ◽  
Oxygen Atoms

Abstract The complex between the polyether ligand 1,11-bis(tropolone)-3,6,9-trioxaundecane and RbI crystallizes in space group P21/c with cell dimensions a = 11.383(4), b = 14.493(5), c = 16.122(6) Å and β = 111.02(5)° with Z = 4. The structure was solved on the basis of 3734 X-ray reflections measured on a diffractometer with CuKα-radiation and refined to an R of 0.101. The polyether wraps around the Rb+ in a circular structure. One of the tropolone rings is elevated in order to avoid collision. Rb+ is located 1.224(6) Å above the plane formed by five oxygen atoms of the ligand, it is coordinated to I -(3.666(2)Å) and to all oxygens. The Rb+ ··· O distances of the least electronegative “ester oxygens”, 3.14(1) Å and 3.18(1) Å are significantly longer compared to the other Rb+···O distances in the range 2.81(1) Å to 3.08(1) Å. The conformation about the C-C and C-O bonds of the ligand are gauche and trans as generally found in such molecules. The two tropolone seven-membered rings are slightly non-planar and display an envelope-type structure.

An X-Ray Crystallographic Study of Cd[P(C-C6H11)3]2(NO3)2.CH2Cl2

1986 ◽  
Vol 39 (4) ◽  
pp. 713 ◽  
Author(s):  
D Dakternieks ◽  
BF Hoskins ◽  
CL Rolls ◽  
ERT Tiekink
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Three Dimensional ◽  
Cadmium Atom ◽  
X Ray Diffraction ◽  
Fourier Methods ◽  
Full Matrix ◽  
X Ray ◽  
Crystallographic Study ◽  
Tetrahedral Environment

The crystal and molecular structure of bis ( tricyclohexylphosphine )cadmium(II) nitrate as its dichloromethane solvate, Cd [P(c-C6H11)3]2(NO3)2.CH2Cl2, has been determined by single- crystal, three-dimensional X-ray diffraction methods. The crystals of the cadmium(II) complex are monoclinic with space group C2/c, a 20.880(6), b 12.775(3), c 17.075(5) Ǻ and β 106.38(2)°, Z 4. The structure was solved by normal Fourier methods and refined by a full-matrix least-squares procedure. The refinement used the 2169 statistically independent reflections for which I ≥ 2σ(I) converged with R and Rw of 0.065 and 0.067 respectively. The crystals consist of discrete Cd [P(c-C6H11)3]2(NO3)2 molecules and CH2Cl2 in the ratio 1 : 1. There is a distorted tetrahedral environment around the cadmium atom formed from the coordination of the two phosphines and two nitrates with each nitrate essentially occupying one stereochemical position. The two markedly different Cd -O bond lengths of 2.405(9) and 2.575(8) Ǻ show gross asymmetry in the coordination of the nitrate.

Organometalloidal Compounds with o-Phenylene Substituents, VII [1] Crystal and Molecular Structure of 10,15-Dihydro-5H-5,10,15-trioxa-tribenzo [a,d,g] cyclononene (Trimeric o-Phenylene Oxide) and its Implications Concerning Preferred Conformations of Compounds (Arylene)3X3

1981 ◽  
Vol 36 (12) ◽  
pp. 1526-1531 ◽  
Author(s):  
Klaus von Deuten ◽  
Günter Klar
Keyword(s):  
Molecular Structure ◽  
Title Compound ◽  
Molecular Conformation ◽  
Crystal And Molecular Structure ◽  
The Other ◽  
Bond Lengths ◽  
Π Interactions ◽  
Phenylene Oxide ◽  
Steric Factors ◽  
Oxygen Atoms

The title compound crystallizes with an orthorhombic P cell, a = 893.5(1), b = 949.2(2), c = 1520.6(3) pm; Z = 4, space group Pnab. Its molecular conformation has crystallographic C2-symmetry with one phenylene ring in the plane of the three oxygen atoms, the other rings extending almost perpendicularly above and below this plane. The two kinds of oxygen atoms in the molecule show characteristic differences with respect to CO bond lengths and COC bond angles; only the oxygen lying on the C2-axis (joining the "perpendicular" rings) exhibits π-interactions with its phenylene rings. The influence of electronic and steric factors on the preferred conformation of the class of compounds (arylene)3X3 is pointed out.

The Crystal and Molecular Structure of (μ-Oxo)bis{chloro(methyl)thienyl- tellurium(IV)}

2001 ◽  
Vol 56 (2) ◽  
pp. 215-218 ◽  
Author(s):  
Raija Oilunkaniemi ◽  
Risto S. Laitinen ◽  
Markku Ahlgrén
Keyword(s):  
Molecular Structure ◽  
Coordination Sphere ◽  
Crystal And Molecular Structure ◽  
Tellurium Atom ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Regular Octahedron ◽  
Oxygen Atoms

Abstract The formation and the crystal and molecular structure of (μ-oxo)bis{chloro(methyl)thienyl-tellurium(IV)}, [Me(Th)TeCl]20 , are described. The compound is orthorhombic, space group Pbcn, a = 1893.30(2), b = 891.96(2), c = 966.24(5) pm; Z =4. The tellurium atom shows trigonal bi-pyramidal coordination with chlorine and the bridging oxygen atoms in axial, and methyl and thienyl groups in equatorial positions. The two close intermolecular Te(1) ···Cl(1) contacts ex­pand the coordination sphere around tellurium to an almost regular octahedron.

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