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.

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.

Preparation and crystal and molecular structure of (η3-octamethylcyclotetraphosphazane-P,P,P)tricarbonylmolybdenum(0), [η3-(CH3PNCH3)4]Mo(CO)3

1982 ◽  
Vol 60 (19) ◽  
pp. 2415-2419 ◽  
Author(s):  
Keith D. Gallicano ◽  
Norman L. Paddock ◽  
Steven J. Rettig ◽  
James Trotter
Keyword(s):  
Molecular Structure ◽  
Solid State ◽  
Phosphorus Atom ◽  
Mirror Symmetry ◽  
Crystal And Molecular Structure ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Full Matrix ◽  
Carbonyl Ligands ◽  
Distorted Octahedral

The synthesis and physical properties of the phosphazane complex [η3-(CH3PNCH3)4]Mo(CO)3 are reported. Crystals of (η3-octamethylcyclotetraphosphazane-P,P,P)tricarbonylmolybdenum(0) are monoclinic, a = 8.6898(9), b = 16.0987(8), c = 14.1156(17) Å, β = 98.321(6)°, Z = 4, space group Cc. The structure was solved by Patterson and Fourier syntheses and was refined by full-matrix least-squares procedures to R = 0.020 and Rw = 0.024 for 2286 reflections with I ≥ 3σ(I). The molybdenum atom is coordinated to three phosphorus atoms of the (MePNMe)4 ligand and to three carbonyl ligands in a distorted octahedral geometry. The molecule has approximate mirror symmetry in the solid state. Important bond lengths (corrected for libration) are: Mo—P = 2.537(1), 2.467(1), and 2.513(1), Mo—C = 1.971(4), 2.002(4), and 1.978(4), mean P—N = 1.704(8) for coordinated P, 1.735(7) Å for uncoordinated P. The structural evidence indicates that the phosphazane is a weaker donor to Mo(CO)3 than to three sulphur atoms, and that coordination withdraws electron density from the fourth phosphorus atom. The complex is fluxional in solution.

Electrochemical Syntheses of Pyrimidine-2-thiolato Complexes of Nickel(II) / Crystal and Molecular Structure of 2,2′-Bipyridine-bis(pyrimidine-2-thiolato)nickel(II) Monohydrate

1990 ◽  
Vol 45 (12) ◽  
pp. 1632-1636 ◽  
Author(s):  
R. Castro ◽  
M. L. Durán ◽  
J. A. García-Vázquez ◽  
J. Romero ◽  
A. Sousa ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Electronic Spectra ◽  
Crystal And Molecular Structure ◽  
Nickel Atom ◽  
Solution Phase ◽  
Monoclinic Space Group ◽  
Distorted Octahedral Coordination ◽  
Bite Angle ◽  
Distorted Octahedral

The electrochemical oxidation of nickel in pyrimidine-2-thione (pymt H) solution yields a compound of formula [Ni(pymt)2]. When pyridine (py), 2,2′-bipyridine (bipy) or 1,10-phenanthroline (phen) are added to the solution phase, the product obtained is a complex [Ni(pymt)2py2] or [Ni(pymt)2L] (L = bipy or phen). The crystal structure of [Ni(pymt)2bipy] · H2O is monoclinic, space group P 21/c, with a = 726.6(2), b = 1586.2(2), c = 1696.7(4) pm, β = 99.04(4)° and Z = 4. The nickel atom has highly distorted octahedral coordination and the pyrimidine-2-thiolato ligand is bidentate, forming two four-membered chelate rings with a small “bite” angle of ca. 68°. The two sulphur atoms are in a trans arrangement. The vibrational and electronic spectra of the compounds are discussed.

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.

scholarly journals Bis[tetrakis(pyridin-2-yl)methane-κ3N,N′,N′′]cobalt(II) tetrakis(thiocyanato-κN)cobaltate(II) methanol monosolvate

2014 ◽  
Vol 70 (3) ◽  
pp. m96-m97 ◽  
Author(s):  
Yuya Tsunezumi ◽  
Kouzou Matsumoto ◽  
Shinya Hayami ◽  
Akira Fuyuhiro ◽  
Satoshi Kawata
Keyword(s):  
Complex Anion ◽  
Complex Cation ◽  
Solvent Molecule ◽  
Octahedral Geometry ◽  
Title Complex ◽  
Distorted Octahedral Geometry ◽  
Weak Hydrogen Bond ◽  
Tetrahedral Geometry ◽  
Distorted Tetrahedral Geometry ◽  
Distorted Octahedral

The title complex, [Co(C21H16N4)2][Co(NCS)4]·CH3OH, consists of one [Co{C(py)4}2]2+complex cation [C(py)4= tetrakis(pyridin-2-yl)methane], one [Co(NCS)4]2−complex anion and a methanol solvent molecule. In the cation, the CoIIatom is coordinated by six N atoms of two C(py)4ligands in a distorted octahedral geometry. In the anion, the CoIIatom is coordinated by the N atoms of four NCS−ligands in a distorted tetrahedral geometry. The methanol molecule is disordered and was modelled over three orientations (occupancies 0.8:0.1:0.1). There are two weak hydrogen-bond-like interactions between the methanol solvent molecule and NCS−ligands of the anion [O...S = 3.283 (3) and 3.170 (2) Å].

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.

Reaktionen koordinierter Liganden, XV [1] .Ligandeneigenschaften komplexer Lithiumorganophosphide (CO)nM(RR′PLi)m (M=Ni,Cr,Mo,W; n=3,4,5; m=1,2) - Kristall- und Molekülstruktur von [(Mo(CO)5)2PPh2]–[(Ph3P)2N]+ / Reactions of Coordinated Ligands, XV [1]. Ligand Properties of Complexes of Lithium Organophosphides (CO)nM(RR′PLi)m (M=Ni,Cr,Mo,W; n=3,4,5; m=1,2) - Crystal and Molecular Structure of [(Mo(CO)5)2PPh2]-[(Ph3P)2N]+

1985 ◽  
Vol 40 (9) ◽  
pp. 1161-1172 ◽  
Author(s):  
David J. Brauer ◽  
Gerd Hasselkuß ◽  
Steven Morton ◽  
Sibbele Hietkamp ◽  
Herbert Sommer ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Phosphorus Atom ◽  
Complex Anion ◽  
Crystal And Molecular Structure ◽  
Binuclear Complexes ◽  
Bidentate Ligands ◽  
Tetrahedral Geometry ◽  
Trans Effect ◽  
Distorted Tetrahedral Geometry ◽  
Phosphine Complexes

Complexes of lithium organophosphides (CO)nM(RR′PLi)m obtained by deprotonation of the corresponding phosphine complexes (CO)nM(RR′PH)m are monodentate or bidentate ligands forming anionic binuclear complexes of the type [(M(CO)5)2PR2]- (A) or [(Mo(CO)4(RR'P)Mo(CO)4]2- which may be isolated as [(Ph3P)2N]+ salts. Oxidation of the anions [Mo(CO)4(RR′P)Mo(CO)4]2- with 1 ,2-dibromoethane affords the neutral phosphido complexes (CO)4Mo(RR′P)Mo(CO)4 with reactive PH functional groups. The crystal and molecular structure of [(Mo(CO)5)2PPh2]- [(Ph3P)2N]+ shows a distorted tetrahedral geometry at the central P atom of the complex anion. The Mo-P bond is unusual long (2.636(1) Å), the phosphorus atom showing a pronounced trans effect on Mo-C bond lengths ((Mo-C)av trans P 1.975(5) Å, (Mo-C)av cis P 2.043(6) (Mo(1)) or 2.038(6) Å (Mo(2)), respectively).

Crystal and molecular structure of Bis(4-amino-3,5,6-trichloropicolinato)-manganese(II) dihydrate

1981 ◽  
Vol 34 (4) ◽  
pp. 891 ◽  
Author(s):  
G Smith ◽  
EJ O'Reilly ◽  
CHL Kennard
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Three Dimensional ◽  
Direct Methods ◽  
Polymer Chains ◽  
Monoclinic Space Group ◽  
Carboxylate Oxygen ◽  
Group 12 ◽  
Distorted Octahedral ◽  
A Cell

The manganese(II) complex [Mn(picl)2,2H2O]n of the herbicide picloram has been prepared and the crystal and molecular structure determined from three-dimensional X-ray data collected by counter methods. The crystals of the complex are monoclinic, space group 12/a with two complex units in a cell of dimensions a 23·052(5), b 13·840(2), c 6·441(1) �, β 98·20(1)�. The structure was solved by direct methods and refined by full matrix least squares to unweighted and weighted Rfactors of 0·035 and 0·038 respectively for 887 'observed' reflections. The polymer is best described as having a centrosymmetric two-molecule unit [Mn-O, 2·162(3), 2·246(3) �] with two oxo bridges between manganese centres through two single carboxylate oxygens of the four substituted picolinate ligands. The two molecules are related by a twofold axis. The units form infinite one-dimensional polymer chains in the c direction through oxo bridges involving one oxygen from the other two picolinate ligands [Mn-Mn 3·636(1)�]. The bis(bidentate)picolinate bites are completed by the pyridlne nitrogens [Mn-N, 2·313(4) �] giving a very distorted octahedral MnO4N2 coordination sphere about each manganese [N-Mn-N', 97.0(3)�; O-Mn-O range, 68·9-168.2(3)�; O-Mn-Nrange, 69·9-138·5(3)�]. The lattice waters are involved in hydrogen-bonding interactions which link the polymer in the a crystallographic direction with the uncoordinated carboxylate oxygen ( O···O,2·824, 2·936 �) and the 4-amino groups from the adjacent picolinate ligand (N· ··0, 2·852, 3·030�).

Crystal and molecular structure of [dimethyl(3,5-dimethyl-1-pyrazolyl)(ethanol-amino)gallato (N(2),O,N(3))](η3-cycloheptatrienyl)dicarbonylmolybdenum

1981 ◽  
Vol 59 (11) ◽  
pp. 1665-1670 ◽  
Author(s):  
Kenneth S. Chong ◽  
Steven J. Rettig ◽  
Alan Storr ◽  
James Trotter
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Least Squares ◽  
Crystal And Molecular Structure ◽  
Amino Nitrogen ◽  
Full Matrix ◽  
Octahedral Environment ◽  
Distorted Octahedral ◽  
Unusual Type

Crystals of [dimethyl(3,5-dimethyl-l-pyrazolyl)(ethanolamino)gallato(N(2),O,N(3))](η3-cycloheptatrienyl)dicarbonylmolybdenum are monoclinic, a = 10.511(1), b = 8.335(1), c = 24.138(3) Å, β = 102.22(1)°, Z = 4, space group P21/c. The structure was solved by Patterson and Fourier syntheses and was reflned by full-matrix least-squares procedures to R = 0.028 and Rw = 0.046 for 3708 reflections with I ≥ 3σ(I). The crystal structure consists of discrete molecules linked by N—H … O hydrogen bonds (N … O = 2.929(5) Å). The Mo atom is in a distorted octahedral environment with the η3-C7H7 ligand occupying one coordination site, trans to the amino nitrogen, as a π-donating ligand. Important bond distances (corrected for libration) are: Mo—O, 2.245(2), Mo—N(amino), 2.249(3), Mo—N(pyrazolyl), 2.270(3), Mo—C(O), 1.950(4) and 1.947(4), Mo—C(C7H7), 2.176(4), 2.364(4), and 2.380(4), Ga—O, 1.919(3), Ga—N, 1.984(3), and Ga—C, 1.982(5) and 1.983(5) Å. An unusual type of disorder is present in which a second image of the molecule, approximately mirrored by the plane y = 1/4, is in evidence at low occupancy.

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