scholarly journals Crystal structure of (2,4-di-tert-butyl-6-{[(6,6′-dimethyl-2′-oxido-1,1′-biphenyl-2-yl)imino]methyl}phenolato-κ3O,N,O′)bis(propan-2-olato-κO)titanium(IV)

2014 ◽  
Vol 70 (9) ◽  
pp. m332-m332 ◽  
Author(s):  
Liang Chen ◽  
Huiran Wang ◽  
Xuebin Deng
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Coordination Polyhedron ◽  
Schiff Base Ligand ◽  
Title Complex ◽  
Bond Lengths ◽  
Trigonal Bipyramidal ◽  
Centrosymmetric Dimers ◽  
Axial Site ◽  
Distorted Trigonal Bipyramidal

In the mononuclear TiIVtitle complex, [Ti(C29H33NO2)(C3H6O)2], the TiNO4coordination polyhedron comprises an N-atom and two O-atom donors from the dianionic Schiff base ligand and two O-atom donors from monodentate isopropoxide anions. The stereochemistry is distorted trigonal–bipyramidal with the N-donor in an elongated axial site [Ti—N = 2.2540 (17) Å], the O-donors having normal Ti—O bond lengths [1.7937 (14) Å (axial)–1.8690 (14) Å]. In the crystal, C—H...π interactions link molecules into centrosymmetric dimers.

scholarly journals Crystal structure of dibromido(N,N-dimethylformamide-κO){2-(1H-indol-3-yl)-N-[(quinolin-2-yl-κN)methylidene]ethanamine-κN}cadmium

2015 ◽  
Vol 71 (2) ◽  
pp. m31-m32 ◽  
Author(s):  
Md. Serajul Haque Faizi ◽  
Natalia O. Sharkina ◽  
Yuliya M. Davydenko
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Equatorial Plane ◽  
Title Complex ◽  
Coordination Geometry ◽  
Trigonal Bipyramidal ◽  
Distorted Trigonal Bipyramidal

In the mononuclear title complex, [CdBr2(C20H17N3)(C3H7NO)], synthesized from the quinoline-derived Schiff base 2-(1H-indol-3-yl)-N-(quinolin-2-ylmethylene)ethanamine (IQME), the coordination geometry around the Cd2+atom is distorted trigonal bipyramidal, the axial positions being occupied by the quinoline N atom [Cd—N = 2.401 (3) Å] and one dimethylformamide O-atom donor [Cd—O = 2.399 (2) Å]. The equatorial plane is formed by the imine N atom [Cd—N = 2.293 (3) Å] and two bromides [Cd—Br = 2.5621 (8) and 2.5676 (8) Å], with the deviation of the CdIIatom from the equatorial plane being 0.046 (1) Å. An intramolecular C—H...Br interaction occurs. In the crystal, N—H...Br interactions generate [101] chains.

scholarly journals Synthesis, Characterization, and Crystal Structure of [Co4(CH3CO2)2L4]2[BPh4]4·0.5H2O, Where HL = 4-(Salicylaldiminato)antipyrine

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Ramadan M. El-mehdawi ◽  
Abdussalam N. EL-dewik ◽  
Mufida M. Ben-Younes ◽  
Fathia A. Treish ◽  
Ramadan G. Abuhmaiera ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Schiff Base Ligand ◽  
Title Complex ◽  
Single Crystal Diffraction ◽  
X Ray ◽  
Tridentate Schiff Base

The title complex was isolated as a red solid from the reaction of 4-(salicylaldiminato)antipyrine, HL, and cobalt (II) acetate in ethanol. The complex has been characterized by elemental analysis, FTIR, UV-Vis, and X-ray single crystal diffraction. Two crystallographically different cationic units, A and B, of the title complex are found. Both units are essentially isostructural; nevertheless, small differences exist between them. Both units contain four cobalt atoms arranged at the corners of distorted cubane-like core alternatively with phenoxy oxygen of the Schiff base. In both cases, one cobalt binds to three coordinated sites from the corresponding tridentate Schiff base ligand, and the fourth one was bonded by the acetate oxygen, and the fifth and the sixth donor sites come from the phenolate oxygen of another Schiff base ligand.

scholarly journals Crystal structure of bis(2-{1-[(E)-(4-fluorobenzyl)imino]ethyl}phenolato-κ2N,O)palladium(II)

2015 ◽  
Vol 71 (4) ◽  
pp. 350-353
Author(s):  
Amalina Mohd Tajuddin ◽  
Hadariah Bahron ◽  
Hamizah Mohd Zaki ◽  
Karimah Kassim ◽  
Suchada Chantrapromma
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Complex ◽  
Asymmetric Unit ◽  
Schiff Base Ligands ◽  
Bond Lengths ◽  
Square Planar ◽  
Coordination Plane

The asymmetric unit of the title complex, [Pd(C15H13FNO)2], contains one half of the molecule with the PdIIcation lying on an inversion centre and is coordinated by the bidentate Schiff base anion. The geometry around the cationic PdIIcentre is distorted square planar, chelated by the imine N- and phenolate O-donor atoms of the two Schiff base ligands. The N- and O-donor atoms of the two ligands are mutuallytrans, with Pd—N and Pd—O bond lengths of 2.028 (2) and 1.9770 (18) Å, respectively. The fluorophenyl ring is tilted away from the coordination plane and makes a dihedral angle of 66.2 (2)° with the phenolate ring. In the crystal, molecules are linked into chains along the [101] direction by weak C—H...O hydrogen bonds. Weak π–π interactions with centroid–centroid distances of 4.079 (2) Å stack the molecules alongc.

scholarly journals Darstellung und Kristallstruktur von K2Sn2S5 und K2Sn2Se5 / Preparation and Crystal Structure of K2Sn2S5 and K2Sn2Se5

1992 ◽  
Vol 47 (2) ◽  
pp. 197-200 ◽  
Author(s):  
Kurt O. Klepp
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Structure Type ◽  
Slow Cooling ◽  
Bond Lengths ◽  
Trigonal Bipyramidal ◽  
Equatorial Bond ◽  
Binary Compounds ◽  
R Factors ◽  
Distorted Trigonal Bipyramidal

K2Sn2S5 and K2Sn2Se5 were prepared by reacting stoichiometric powdered mixtures of the binary compounds K2S or K2Se with Sn and the corresponding chalcogen at 1070 K, followed by slow cooling of the melt. The two compounds are isostructural and crystallize with the Tl2Sn2S5 structure type, s.g. C 2/c, Z = 4 with a = 11.072(5) Å, b = 7.806(3)Å, c = 11.517(5)Å, β = 108.43(2)° for K2Sn2S5 and a = 11.613(5)Å, b = 8.189(3) Å, c = 11,897(6) Å, β = 108.28(2)° for K2Sn2Se5. The crystal structures were refined to conventional R-factors of 0.032 and 0.031, respectively. Sn-atoms are in a distorted trigonal-bipyramidal chalcogen coordination. The average equatorial bond lengths are Sn -S: 2.427 Å and Sn -Se: 2.552 Å , the axial ones are Sn -S: 2.600 Å and Sn -Se: 2.774 Å.

scholarly journals Crystal structure of bis{μ-(E)-2-[(2-oxidophenylimino)methyl]quinolin-8-olato-κ4O,N,N′,O′}bis[dibutyltin(IV)]

2017 ◽  
Vol 73 (1) ◽  
pp. 4-7
Author(s):  
Camacho-Camacho Carlos ◽  
Ortiz-Pastrana Naytzé ◽  
Garza-Ortiz Ariadna ◽  
Rojas-Oviedo Irma
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Metal Atom ◽  
Title Complex ◽  
Unit Cell ◽  
Type Structure ◽  
Triclinic Space Group ◽  
Space Group ◽  
Centrosymmetric Dimers ◽  
Oxygen Atoms

Condensation of 8-hydroxyquinoline-2-carbaldehyde with 2-aminophenol gave the (E)-2-[(2-hydroxyphenylimino)methyl]quinolin-8-ol derivative that reacted with di-n-butyltin oxide with release of H2O to yield the chelate title complex, [Sn2(C4H9)4(C16H10N2O2)2]. The compound crystallizes in the triclinic space groupP-1, with two independent centrosymmetric dimers in the unit cell. Each features a typical pincer-type structure where the dianionic ligand is tetradentate, coordinating to the central tin atom through both phenolate oxygen atoms, as well as through the quinoline and imine N atoms. Each metal atom adopts a distorted pentagonal–bipyramidal SnC2N2O3coordination arising from theN,N′,O,O′-tetradentate deprotonated Schiff base, one bridging phenolate O atom of the neighbouring ligand and two butyl groups in the axial sites.

Neue Oxopnictate AI3MVO4: Darstellung und Kristallstruktur von A3AsO4 (A = K, Rb, Cs) und K3BiO4 / New Oxopnictates AI3MVO4: Synthesis and Crystal Structure of A3AsO4 (A = K, Rb, Cs) and K3BiO4

2002 ◽  
Vol 57 (6) ◽  
pp. 599-604 ◽  
Author(s):  
Franziska Emmerling ◽  
Mamdouh Idilbi ◽  
Caroline Röhr
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Crystal Structures ◽  
Close Packing ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Trigonal Bipyramidal Geometry ◽  
Trigonal Bipyramidal ◽  
Centrosymmetric Dimers ◽  
Distorted Trigonal Bipyramidal

Abstract The title compounds have been synthesized via oxidation of the elemental pnicogenes (M = As, Bi) with the hyperoxides AO2 (A = K, Rb, Cs) and their crystal structures were determined on the basis of single crystal X-ray data. In K3AsO4 (orthorhombic, Cccm, a = 1060:1(1), b = 1135:2(1), c = 1694:0(2) pm, Z = 16) and Cs3AsO4(orthorhombic, Pnma, a = 1254:3(2), b = 902:9(2), c = 658:5(3) pm, Z = 4) isolated tetrahedra [AsO4]3- with distances As-O between 167.0 and 170.5 pm are present, which are arranged in a nearly cubic close packing. The structure of K3BiO4 (triclinic, P1̄, a = 643:18(6), b = 657:27(6), c = 762:41(7) pm, α = 101:724(2)°, β = 96:472(2)°, γ = 105:465(2)°, Z = 2) contains centrosymmetric dimers [O3BiO2BiO3]6-, in which the Bi(V) atoms are surrounded by five O atoms in a distorted trigonal bipyramidal geometry with distances Bi-O in the range of 199.5 to 233.1 pm.

scholarly journals Crystal structure of {6,6′-dihydroxy-2,2′-[iminobis(propane-1,3-diylnitrilomethanylylidene)]diphenolato-κ5O1,N,N′,N′′,O1′}copper(II)

2015 ◽  
Vol 71 (11) ◽  
pp. m203-m204
Author(s):  
Shabana Noor ◽  
Sarvendra Kumar ◽  
Suhail Sabir ◽  
Rüdiger W. Seidel ◽  
Richard Goddard
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Asymmetric Unit ◽  
Bond Forming ◽  
Trigonal Bipyramidal ◽  
Column Structure ◽  
Independent Molecules ◽  
Distorted Trigonal Bipyramidal

The title compound, [Cu(C20H23N3O4)], crystallizes in the space groupCcwith two independent molecules in the asymmetric unit. The CuIIatoms are each coordinated by the pentadentate Schiff base ligand in a distorted trigonal bipyramidal N3O2geometry. The equatorial plane is formed by the two phenolic O atoms and the amine N atom, while the axial positions are occupied by the two imine N atoms. In the crystal, the two independent molecules are each connected into a column along thebaxis through intermolecular O—H...O hydrogen bonds. The two independent columns are further linked through an N—H...O hydrogen bond, forming a double-column structure.

scholarly journals Crystal structure of di-μ-acetato-diacetatobis(μ-6,6′-dimethoxy-2,2′-{[(propane-1,3-diylbis(azanylylidene)]bis(methanylylidene)}diphenolato)tetrazinc

2015 ◽  
Vol 71 (12) ◽  
pp. m217-m218
Author(s):  
Xue Cai ◽  
Hui Ning
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Title Complex ◽  
The Other ◽  
Van Der Waals Interactions ◽  
Axial Position ◽  
Asymmetric Unit ◽  
Schiff Base Ligands ◽  
A Chain

The tetranuclear title complex, [Zn4(C19H20N2O4)2(CH3COO)4], is formed from two dinuclear motifs related by an inversion centre. The two crystallographically independent ZnIIions in the asymmetric unit are in different coordination environments. One is square-based pyramidal with one O atom of an acetate group occupying the axial position and two N and O atoms of one bmspd [H2bmspd =N,N′-bis(3-methoxysalicylidene)propylene-1,3-diamine] Schiff base ligand forming the basal plane. The other ZnIIatom is six-coordinated by four O atoms of the bmspd ligand forming the equatoral plane and two O atoms of different acetate groups located in the axial positions. As a result, the two phenolic planes of the bicompartmental Schiff base ligand are distorted slightly. However, the planes of the two Schiff base ligands are parallel. In addition, the Zn—N and Zn—O bond lengths span the reasonable ranges 2.062 (2)–2.073 (2) and 1.9261 (15)–2.4356 (16) Å, respectively. The Zn...Zn distances separated by phenolic O atoms are 3.2466 (4) Å while the Zn...Zn distances bridged by acetate groups are 5.9835 (6) Å. The tetranuclear moieties are connected by van der Waals interactions, and form a chain alongcaxis.

Bis(cyclopentenylacetato)tetramethyldistannoxane dimer

2006 ◽  
Vol 62 (5) ◽  
pp. m1167-m1169 ◽  
Author(s):  
Aftab Ahmad ◽  
Azim Khan ◽  
Saqib Ali ◽  
Masood Parvez
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Narrow Range ◽  
Trigonal Bipyramidal Geometry ◽  
Trigonal Bipyramidal ◽  
A Value ◽  
Centrosymmetric Dimers ◽  
Distorted Trigonal Bipyramidal

The crystal structure of the title compound, tetra-μ2-(cyclopent-2-enyl)acetato-1:2κ2 O:O′;1:3κ2 O:O′;2:4κ2 O:O′;3:4κ2 O:O′-octamethyl-1κ2 C,2κ2 C,3κ2 C,4κ2 C-di-μ3-oxo-1:2:3κ3 O;2:3:4κ3 O-tetratin(IV), [Sn4(CH3)8(C7H9O2)4O2], is composed of discrete centrosymmetric dimers lying about inversion centres. The cyclopentenylacetate ligand shows different modes of coordination with Sn, as a result of which the central Sn2O2 core is fused with two four-membered (Sn2O2) and two six-membered (Sn2O3C) rings. The endocyclic Sn atoms are six-coordinate in a skew-trapezoidal bipyramidal environment. The exocyclic Sn atoms are five-coordinate and show distorted trigonal–bipyramidal geometry. The Sn—C distances lie in a very narrow range [2.095 (4)–2.113 (4) Å], while the Sn—O distances range between 2.030 (3) and 2.280 (3) Å for strong bonds and a value of 2.654 (3) Å for the relatively weak Sn—O bond.

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