Bending of the reduced porphyrin of factor F430 can accommodate a trigonal-bipyramidal geometry at nickel: a conformational analysis of this nickel-containing tetrapyrrole, in relation to archaebacterial methanogenesis

1990 ◽  
Vol 112 (3) ◽  
pp. 1062-1066 ◽  
Author(s):  
Marc Zimmer ◽  
Robert H. Crabtree
Keyword(s):  
Conformational Analysis ◽  
Trigonal Bipyramidal Geometry ◽  
Trigonal Bipyramidal ◽  
Factor F430

scholarly journals An orthorhombic polymorph of dichlorotris(pentafluorophenyl)phosphorane

2006 ◽  
Vol 62 (7) ◽  
pp. o2872-o2874
Author(s):  
Nicholas A. Barnes ◽  
Stephen M. Godfrey ◽  
Ruth T. A. Halton ◽  
Imrana Mushtaq ◽  
Robin G. Pritchard
Keyword(s):  
Crystal Packing ◽  
Trigonal Bipyramidal Geometry ◽  
Monoclinic Form ◽  
Trigonal Bipyramidal

An orthorhombic form of dichlorotris(pentafluorophenyl)phosphorane, C18Cl2F15P, has been obtained as the product of the reaction between PhSeCl and (C6F5)3P, and is a polymorph of the previously reported monoclinic form obtained from the reaction of (C6F5)3P with Cl2. The molecule displays nearly perfect trigonal–bipyramidal geometry, and features a number of intermolecular F...F contacts, which lead to fluorous domains in the crystal packing.

A hexagonal modification of catena-poly[[ethyldiphenyltin(IV)]-μ-2-chloroacetato-κ2 O:O′]

2007 ◽  
Vol 63 (3) ◽  
pp. m913-m914
Author(s):  
Mostafa M. Amini ◽  
Vajihe Alijani ◽  
Amirreza Azadmeher ◽  
Seik Weng Ng
Keyword(s):  
Coordination Polymer ◽  
Trigonal Bipyramidal Geometry ◽  
Trigonal Bipyramidal ◽  
Hexagonal Modification

In the title coordination polymer, [Sn(C2H5)(C6H5)2(C2H2ClO2)] n , the five-coordinate Sn atom shows an SnC3O2 trigonal–bipyramidal geometry, with O atoms in the axial positions.

Die Kristallstruktur von Kalium-bis(hexamethylentetramin)-tris-(isothiocyanato)cuprat(II)-dihydrat, K[Cu(C6H12N4)2(NCS)3] · 2 H2O, einem trigonal-bipyramidalen Kupfer(II) -Komplex / The Crystal Structure of Potassium-bis(hexamethylenetetramine)-tris-(isothiocyanato) cuprate(II )-dihydrate, K[Cu(C6H12N4)2(NCS)3] · 2 H2O, a Trigonal Bipyramidal Cupric Complex

1981 ◽  
Vol 36 (5) ◽  
pp. 649-650 ◽  
Author(s):  
Joachim Pickardt
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Structure Analysis ◽  
Title Compound ◽  
X Ray ◽  
Trigonal Bipyramidal Geometry ◽  
Trigonal Bipyramidal ◽  
Cupric Acetate

From an aqueous solution of cupric acetate containing an excess of KSCN and hexamethy- lenetetramine crystals of the title compound could be obtained. An X-ray structure analysis showed that the cuprate(II) anion has trigonal bipyramidal geometry. The three equatorial positions are occupied by NCS groups, the axial positions by the hexamethylenetetramine molecules

Oligophosphin-Liganden, III [1] Bis(3-diphenylphosphinopropyl)phenylphospbinchloroiridium(I) * * und dessen Carbonyl-und Hydridderivate / Oligophosphine Ligands, III [1] Bis(3-diphenylphosphinopropyl)phenylphosphinechloroiridium(I) and its Carbonyl and Hydride Derivatives

1981 ◽  
Vol 36 (6) ◽  
pp. 672-676 ◽  
Author(s):  
Ertugrul Arpac ◽  
Lutz Dahlenburg
Keyword(s):  
Nmr Spectroscopy ◽  
Title Complex ◽  
Trigonal Bipyramidal Geometry ◽  
Trigonal Bipyramidal ◽  
Nmr Data ◽  
Ir And Nmr Spectroscopy ◽  
Infrared Intensities

AbstractThe title complex, IrCl(bdpp) (1), where bdpp = PhP[(CH2)3PPh2]2, has been obtained from [IrCl(C8H14)2]2 and the triphosphine ligand. Characteristic 31P NMR data of 1 dissolved in THF are δ(P̲Ph2) = 2.7 and δ(P̲Ph) = - 19.9 with cis-2J(P̲IrP̲) = 32.8 Hz. Reaction of 1 with CO proceeds stepwise to yield five-coordinate IrCl(CO)(bdpp) (2) and ionic [Ir(CO)2(bdpp)]Cl (3). A trigonal bipyramidal geometry with equatorial CO ligands is assigned to the cation of 3 on the basis of its v(CO) infrared intensities. When allowed to react with HCl, 1 gives the monohydride IrHCl2(bdpp) (4). Similarly, the dihydride IrH2Cl(bdpp) (5) is formed from 1 and H2. As has been established by IR and NMR spectroscopy, 4 and 5 adopt cis-mer-octahedral structures.

scholarly journals Di-μ-aqua-bis{diaqua[μ-4-({4-[bis(2-hydroxyethyl)amino]-6-chloro-1,3,5-triazin-2-yl}amino)benzenesulfonato]sodium(I)}

2012 ◽  
Vol 68 (6) ◽  
pp. m847-m848
Author(s):  
Mei Zhang ◽  
Fu-Yu Sun ◽  
Gui-Zhe Zhao ◽  
Ya-Qing Liu
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Water Molecules ◽  
Coordination Geometry ◽  
Trigonal Bipyramidal Geometry ◽  
Trigonal Bipyramidal ◽  
Distorted Trigonal Bipyramidal

In the dinuclear title compound, [Na2(C13H15ClN5O5S)2(H2O)6] n , two Na+ cations, disposed about a centre of inversion, are linked by two bridging water molecules. The coordination geometry is based on an O5 donor set defined by four water molecules and a 4-aminobenzenesulfonate O atom in a distorted trigonal–bipyramidal geometry. In the crystal, significant O—H...O, O—H...N and N—H...O hydrogen bonds lead to the formation of a three-dimensional architecture.

Tricarbonyl(η4-1.5-cümethylen-2.6-cümethylcyclooctan)eisen: photochemische Synthese und Struktur / Tricarbonyl(η4-1,5-dimethylene-2,6-dimethylcyclooctane)iron: Photochemical Synthesis and Structure

1980 ◽  
Vol 35 (3) ◽  
pp. 360-365 ◽  
Author(s):  
Friedrich-Wilhelm Grevels ◽  
Konrad Schneider ◽  
Carl Krüger ◽  
Richard Goddard
Keyword(s):  
Photochemical Synthesis ◽  
Carbonyl Groups ◽  
Double Bonds ◽  
Trigonal Bipyramidal Geometry ◽  
Trigonal Bipyramidal ◽  
Coordination Plane

Extended photolysis of pentacarbonyliron in neat 2,3-dimethylbutadiene results in dimerization of the diene and formation of tricarbonyl(η4-1,5-dimethylene-2,6-dimethylcyclooctane) iron (1). The structure of complex 1 is characterized by a trigonal-bipyramidal geometry whereby the exocyclic double bonds of the diene ligand and one of the carbonyl groups lie exactly in the equatorial coordination plane.

[4-(Dimethylamino)pyridine-κN]bis(pentane-2,4-dionato-κ2 O,O′)copper(II)

2006 ◽  
Vol 62 (5) ◽  
pp. m1142-m1143 ◽  
Author(s):  
Leonard F. Lindoy ◽  
John C. McMurtrie ◽  
David Schilter
Keyword(s):  
Title Complex ◽  
Twofold Axis ◽  
Trigonal Bipyramidal Geometry ◽  
Trigonal Bipyramidal ◽  
Distorted Trigonal Bipyramidal

The title complex, [Cu(C5H7O2)2(C7H10N2)], is disposed about a twofold axis and forms a discrete molecule with the metal adopting a distorted trigonal–bipyramidal geometry within an NO4 donor set.

A new dinuclear ZnII compound with a 1,4-benzenedicarboxylate bridge

2006 ◽  
Vol 62 (7) ◽  
pp. m1535-m1537 ◽  
Author(s):  
Guang-Bo Che
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Supramolecular Structure ◽  
Dinuclear Complex ◽  
Inversion Symmetry ◽  
Two Dimensional ◽  
Trigonal Bipyramidal Geometry ◽  
Trigonal Bipyramidal

In the compound μ2-1,4-benzenedicarboxylate-κ2 O,O′-bis{aquachloro[4-(1H-1,3,7,8-tetraazacyclopenta[l]phenanthren-2-yl)phenol-κ2 N,N′]zinc(II)} dihydrate, [Zn2Cl2(1,4-BDC)(L)2(H2O)2]·2H2O, where 1,4-BDC is the 1,4-benzenedicarboxylate dianion, C8H4O4 2−, and L is 4-(1H-1,3,7,8-tetraazacyclopenta[l]phenanthren-2-yl)phenol, C19H12N4O, the ZnII atom is five-coordinated by two N atoms from one L ligand, one Cl− ion, an O atom from a 1,4-BDC anion and one water molecule in an approximate trigonal–bipyramidal geometry. The complete 1,4-BDC ligand is generated by inversion symmetry; it bridges two ZnII atoms to form a dinuclear complex. Neighbouring complexes interact through π–π contacts and various kinds of hydrogen bonds, leading to a two-dimensional supramolecular structure.

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