scholarly journals Bis(η5-cyclopentadienyl)(2-{[(2-methoxyphenyl)imino]methyl}phenolato-κ3 O,N,O′)terbium

2022 ◽  
Vol 78 (1) ◽  
Author(s):  
Mikhail E. Minyaev ◽  
Konstantin A. Lyssenko ◽  
Dmitrii M. Roitershtein ◽  
Ilya E. Nifant'ev
Keyword(s):  
Title Compound ◽  
Coordination Mode ◽  
Organic Ligand ◽  
Cyclopentadienyl Ligands ◽  
Moisture Sensitive

The air- and moisture-sensitive title compound, [Tb(C5H5)2(C14H12NO2)], was synthesized from tris(cyclopentadienyl)(tetrahydrofuran)terbium and 2-{[(2-methoxyphenyl)imino]methyl}phenol. Each Tb atom is coordinated by two cyclopentadienyl ligands in an η5-coordination mode and by one N and two O atoms of the organic ligand in a tridentate κ3 O,N,O′-mode.

scholarly journals Kristallstruktur und Schwingungsspektrum des Thallium(I)-Zinn(II)-ortho-Thiophosphates TlSnPS4

1987 ◽  
Vol 42 (11) ◽  
pp. 1309-1312 ◽  
Author(s):  
Robert Becker ◽  
Wolfgang Brockner ◽  
Brigitte Eisenmann
Keyword(s):  
Raman Spectrum ◽  
Melting Point ◽  
Title Compound ◽  
Far Infrared ◽  
Orthorhombic System ◽  
Space Group ◽  
Lattice Constants ◽  
Moisture Sensitive

TlSnPS4 crystallizes in the orthorhombic system, space group Pna21 (Nr. 33), Z = 4 with the lattice constants a = 1175.8 (5) pm, b = 890.1 (4) pm, c = 663.3 (4) pm. In the structure are sligthly distorted discrete PS3-4 anions.The far infrared, infrared and Raman spectrum is assigned on the basis of PS3-4 -units with C3v symmetry. According to the DTA data the melting point for TlSnPS4 is 575 ± 5 °C. The title compound is not moisture sensitive and semi-conducting.

catena-Poly[[triaquazinc(II)]-μ-5-hydroxyisophthalato-κ2 O:O′]

2006 ◽  
Vol 62 (4) ◽  
pp. m731-m733 ◽  
Author(s):  
Hong-Ping Xiao
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Coordination Mode ◽  
Three Dimensional ◽  
Zigzag Chain ◽  
Intermolecular Hydrogen Bonds ◽  
Carboxylate Groups ◽  
Dimensional Network

In the title compound, [Zn(C8H4O5)(H2O)3] n , the ZnII atom is in a five-coordinated environment defined by three aqua O atoms and two carboxylate O atoms from two different 5-hydroxyisophthalate dianions. In the 5-hydroxyisophthalate dianions, two carboxylate groups coordinate two ZnII cations in a bidentate bridging coordination mode, forming a zigzag chain. In addition, O—H...O intermolecular hydrogen bonds link the chains into a three-dimensional network.

The layered structure of poly[[hexaaqua(μ4-benzene-1,2,4,5-tetracarboxylato)dicopper(II)] tetrahydrate]

2013 ◽  
Vol 69 (11) ◽  
pp. 1344-1347 ◽  
Author(s):  
Patricio Cancino ◽  
Evgenia Spodine ◽  
Verónica Paredes-García ◽  
Diego Venegas-Yazigi ◽  
Andrés Vega
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Layered Structure ◽  
Title Compound ◽  
Coordination Mode ◽  
Water Molecules ◽  
Two Dimensional ◽  
Coordination Environment ◽  
Dimensional Network

In the structure of the title compound, {[Cu2(C10H2O8)(H2O)6]·4H2O}n, the benzene-1,2,4,5-tetracarboxylate ligand, (btec)4−, is located on a crystallographic inversion centre in a μ4-coordination mode. The coordination environment of each pentacoordinated CuIIcentre is square pyramidal (SBP), formed by three water molecules and two carboxylate O atoms from two different (btec)4−ligands. The completely deprotonated (btec)4−ligand coordinates in a monodentate mode to four CuIIatoms. The alternation of (btec)4−ligands and SBP CuIIcentres leads to the formation of a planar two-dimensional covalent network of parallelograms, parallel to theabplane. Hydrogen bonds between a basal water molecule and an apical one from an adjacent [Cu(btec)0.5(H2O)3] unit exist in the intralayer space. Hydrogen bonds are also present between the two-dimensional network and the water molecules filling the channels in the structure.

Triaqua[2-(6-oxido-4-oxo-3,4-dihydropyimidin-2-ylsulfanyl)acetato]nickel(II) 2.5-hydrate

2007 ◽  
Vol 63 (3) ◽  
pp. m761-m763 ◽  
Author(s):  
Yan Jiao ◽  
Zhao-Rui Pan ◽  
Zhi-Jie Fang ◽  
Yi-Zhi Li ◽  
He-Gen Zheng
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Network Structure ◽  
Title Compound ◽  
Three Dimensional ◽  
Organic Ligand ◽  
Water Molecules ◽  
Hydrogen Bonding Interactions ◽  
Acetate Ligand ◽  
Dimensional Network

In the crystal structure of the title compound, [Ni(C6H4N2O4S)(H2O)3]·2.5H2O, the NiII atom is six-coordinated by one 2-(6-oxido-4-oxo-3,4-dihydropyimidin-2-ylsulfanyl)acetate ligand and three water molecules. Hydrogen-bonding interactions between the coordinated and uncoordinated water molecules and between the water molecules and the organic ligand result in a three-dimensional network structure.

scholarly journals Crystal structure of bis(η5-cyclopentadienyl)(2,3-diethylbutane-1,4-diyl)hafnium(IV)

2015 ◽  
Vol 71 (1) ◽  
pp. m7-m7
Author(s):  
Vladimir V. Burlakov ◽  
Wolfgang Baumann ◽  
Perdita Arndt ◽  
Anke Spannenberg ◽  
Uwe Rosenthal
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Site Occupancy ◽  
Structural Motif ◽  
Ethyl Group ◽  
Cyclopentadienyl Ligands ◽  
Twist Conformation

The title compound, [Hf(C5H5)2(C8H16)], proves a structural motif of hafnacyclopentane besides the coordination of two cyclopentadienyl ligands in an η5-fashion. The hafnacyclopentane ring has a twist conformation and is substituted by two ethyl groups in the β,β′-positions, which aretransorientated to each other. One cyclopentadienyl ring and one ethyl group are each disordered over two positions with site-occupancy ratios of 0.679 (15):0.321 (15) and 0.702 (18):0.298 (18), respectively.

N-TrimethylsilyMminotriphenylphosphoran-Kupfer(II)-chlorid, [Me3 SiNPPh3 · CuCl 2 ]2 Synthese und Kristallstruktur / N-Trimethylsilyl-iminotriphenylphosphorane Copper(II) Chloride, [Me3 SiNPPh3 · CuCl 2] 2 Synthesis and Crystal Structure

1988 ◽  
Vol 43 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Dieter Fenske ◽  
Eberhard Böhm ◽  
Kurt Dehnicke ◽  
Joachim Strähle
Keyword(s):  
Crystal Structure ◽  
Coordination Number ◽  
Structure Determination ◽  
Ir Spectrum ◽  
Title Compound ◽  
Unit Cell ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
Bond Lengths ◽  
Moisture Sensitive

Abstract The title compound has been prepared by the reaction of N-trimethylsilyl-iminotriphenylphos-phorane with copper(II) chloride in boiling CCl4 /C2H5OH, and forms moisture sensitive crystals, which are green in transmittance and black in reflexion. [Me3SiNPPh3 · CuCl2 ] 2 was characterized by its IR spectrum as well as by a crystal structure determination (4197 observed, independent reflexions, R = 0.049). The lattice dimensions are at 20 °C: a = 1102.7. b = 1407.3. c = 1560.2 pm; β = 94.27°; space group P21/n with two formula units in the unit cell. The complex consists of centrosymmetric, dimeric molecules with a planar Cu2 Cl2 ring (Cu-CI bond lengths 229 and 231 pm). A terminally bonded CI atom (Cu-CI = 221 pm) and the N atom of the Me3SiNPPh3 ligand (Cu-N = 198.5 pm) complete the coordination number four of the nearly planar surroundings of the Cu atoms.

scholarly journals Bis(di-2-pyridylmethanediol-κ3N,O,N′)nickel(II) dinitrate

2009 ◽  
Vol 65 (6) ◽  
pp. m678-m679 ◽  
Author(s):  
Seung Man Yu ◽  
Young Joo Song ◽  
Kang Chul Kim ◽  
Cheal Kim ◽  
Youngmee Kim
Keyword(s):  
Hydrogen Bonds ◽  
High Spin ◽  
Title Compound ◽  
Coordination Mode ◽  
Nitrate Anion ◽  
Inversion Center ◽  
Bond Lengths ◽  
Octahedral Environment ◽  
Distorted Octahedral

The title compound, [Ni(C11H10N2O2)2](NO3)2, consists of an NiIIatom coordinated by two tridentate chelating di-2-pyridylmethanediol [(2-py)2C(OH)2] ligands. The NiIIatom is located on an inversion center. The geometry around the NiIIatom is distorted octahedral. Thegem-diol (2-py)2C(OH)2ligand adopts the coordination mode η1:η1:η1. The Ni—N and Ni—O bond lengths are typical for high-spin NiIIin an octahedral environment [Ni—N = 2.094 (2) and 2.124 (3) Å, and Ni—O = 2.108 (3) Å]. One of the hydroxy H atoms is split over two positions which both interact with the nitrate anion. The occurence of different O—H...O hydrogen bonds leads to the formation of a layer parallel to the (101) plane.

scholarly journals cyclo-Tetrakis(μ-2,4,6-trimethylphenyl-κC 1:κC 1)bis(trimethylphosphane)-1κP,3κP-tetracopper(I)

IUCrData ◽  
2021 ◽  
Vol 6 (6) ◽  
Author(s):  
Phil Liebing ◽  
Kurt Merzweiler
Keyword(s):  
Molecular Structure ◽  
Title Compound ◽  
Coordination Mode

The title compound, [Cu4(C9H11)4(C3H9P)2] or [Cu4(Mes)4(PMe3)2] (Mes = 2,4,6-trimethylphenyl), was synthesized from copper(I) mesityl and trimethylphosphane in THF as solvent. The molecular structure of the complex has C 2 symmetry and consists of four copper(I) atoms bridged by four μ-mesityl groups, giving an eight-membered puckered {Cu4C4} ring. Additionally, two copper(I) atoms at opposite corners of the Cu4 rhomb are each linked to a terminal PMe3 ligand. The PMe3-bearing copper(I) atoms exhibit a distorted trigonal–planar coordination mode whereas the remaining Cu atoms linked to two mesityl groups are nearly linearly coordinated.

Reactions of Fe3(CO)12 and Fe(CO)5 with functionalized alkynes in CH3OH–KOH solution — The crystal structure of Fe2(CO)6(PPh3)[µ-η3-(H2CCCH2)]

2006 ◽  
Vol 84 (2) ◽  
pp. 337-344 ◽  
Author(s):  
Giuliana Gervasio ◽  
Domenica Marabello ◽  
Enrico Sappa ◽  
Andrea Secco
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Coordination Mode ◽  
Iron Complexes ◽  
Reaction Pathways ◽  
X Ray ◽  
Iron Carbonyls ◽  
By Products

The complex Fe2(CO)7(H2CCCH2) (1) is obtained starting from a variety of functionalized alkynes that can release C3 fragments during the reactions with Fe3(CO)12 or Fe(CO)5 in CH3OH–KOH solutions. Owing to the oily nature of 1, it was reacted with triphenylphosphine, and the structure of the resulting title compound (1a) has been determined by X-ray analysis. Complex 1a shows a new coordination mode of a H2C=C=CH2 ligand to a diiron centre and is, to our knowledge, unprecedented. We have also found that 1 (and 1a) are by-products, and not intermediates in the formation of complex 3. A discussion of the possible reaction pathways is given.Key words: iron carbonyls, alkynols, CO and methanol activation, acetyl and acetate complexes, allenyl iron complexes, crystal structure.

The reduction of (1-(4-cyanophenyl)-3-hydroxy-2-buten-1-one-N)pentaamminecobalt(III) by chromium(II)

1986 ◽  
Vol 64 (5) ◽  
pp. 841-844
Author(s):  
Robert J. Balahura ◽  
A. Johnston
Keyword(s):  
Dissociation Constant ◽  
Title Compound ◽  
Organic Ligand ◽  
Protonated Form ◽  
Acid Dissociation ◽  
Acid Dissociation Constant ◽  
Rate Law ◽  
First Order ◽  
Inner Sphere ◽  
Sphere Mechanism

The reduction of the title compound,[Formula: see text]by chromium(II) is first order in Cr(II) and obeys the rate law kobsd = k1Ka′/(Ka′ + [H+]) at 25.0 °C and I = 1.0 mol L−1 (LiClO4) with k1 = (2.9 ± 0.1) × 104 L mol−1 s−1 and Ka′ = 0.86 ± 0.03 mol L−1. In the rate law, k1 refers to reduction of the 3+ ion above and the Ka′ is the acid dissociation constant for the protonated form of 1. The reduction occurs by a remote attack inner-sphere mechanism with complete transfer of the organic ligand to chromium.

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