New Paramagnetic Re(II) Compounds with Nitrile and Cyanide Ligands Prepared by Homolytic Scission of Dirhenium Complexes

2003 ◽  
Vol 42 (14) ◽  
pp. 4256-4258 ◽  
Author(s):  
Eric J. Schelter ◽  
Jitendra K. Bera ◽  
John Bacsa ◽  
José Ramón Galán-Mascarós ◽  
Kim R. Dunbar
Keyword(s):  
Dirhenium Complexes ◽  
Cyanide Ligands

Synthesis and crystal structures of bis(imidazolidine-2-thione-κS)bis(thiocyanato-κS)mercury(II) and bis(cyanido)bis(μ2-imidazolidine-2-thione-κS)mercury(II).Hg(CN)2

2017 ◽  
Vol 72 (9) ◽  
pp. 671-676 ◽  
Author(s):  
Muhammad Ashraf Shaheen ◽  
Muhammad Nawaz Tahir ◽  
Sarwat Sabir ◽  
Aneela Anwar ◽  
Anvarhusein A. Isab ◽  
...  
Keyword(s):  
Rotation Axis ◽  
Mercury Atom ◽  
Distorted Octahedral Geometry ◽  
Weakly Bound ◽  
X Ray ◽  
X Ray Crystallography ◽  
Hydrogen Bonding Interactions ◽  
Ir And Nmr Spectroscopy ◽  
Distorted Octahedral ◽  
Cyanide Ligands

AbstractTwo mercury(II) complexes containing imidazolidine-2-thione (Imt) and thiocyanate or cyanide ligands, [Hg(Imt)2(SCN)2] (1) and [Hg(Imt)2(CN)2].Hg(CN)2(2), have been prepared and characterized by IR and NMR spectroscopy and X-ray crystallography. In compound1, the mercury atom is located on a two-fold rotation axis and is coordinated to two thione sulfur atoms of imidazolidine-2-thione (Imt) and to two sulfur atoms of thiocyanate in a distorted tetrahedral mode with the S-Hg-S bond angles in the range of 98.96(3)–148.65(6)°. In2, the mercury atom is hexa-coordinated having a distorted octahedral geometry composed of two cyanide C atoms [Hg-C=2.055(5) Å] and four weakly bound thione S atoms of imidazolidine-2-thione (Imt) [Hg-S=3.1301(13) and 3.1280(13) Å]. One free Hg(CN)2molecule is also present in the crystal. In both complexes, the molecular structure is stabilized by N-H…N and N-H…S hydrogen bonding interactions.

ChemInform Abstract: μ-ALLENYLIDENEDIMANGANESE AND -DIRHENIUM COMPLEXES

1985 ◽  
Vol 16 (22) ◽  
Author(s):  
H. BERKE ◽  
P. HAERTER ◽  
G. HUTTNER ◽  
L. ZSOLNAI
Keyword(s):  
Dirhenium Complexes

Heterometallic Molecular Squares and Polymers Based On Self-Assembly Reactions of Multiply Bonded Dirhenium Complexes

2004 ◽  
Vol 2004 (2) ◽  
pp. 368-375 ◽  
Author(s):  
Jitendra K. Bera ◽  
John Bacsa ◽  
Bradley W. Smucker ◽  
Kim R. Dunbar
Keyword(s):  
Self Assembly ◽  
Dirhenium Complexes ◽  
Multiply Bonded ◽  
Molecular Squares

Cyano-Bridged Bimetallic Complexes of Copper(II) with Nitroprusside. Crystal Structure of [Cu(H2NCH2CH(NH2)CH3)2Fe(CN)5NO] . H2O

2000 ◽  
Vol 53 (3) ◽  
pp. 225 ◽  
Author(s):  
Zdenek Smékal ◽  
Zdenek Trávnícek ◽  
Jaromír Marek ◽  
Milan Nádvornik
Keyword(s):  
Crystal Structure ◽  
Structural Analysis ◽  
Magnetic Measurements ◽  
X Ray ◽  
Cyanide Group ◽  
Cyanide Ligand ◽  
Binuclear Structure ◽  
Tetragonal Pyramidal ◽  
Cyanide Ligands ◽  
Diamine Ligands

Five new complexes of compositions [Cu(1,2-pn)2Fe(CN)5NO]·H2O (1,2-pn = propane-1,2-diamine) and [Cu(L)Fe(CN)5NO]·xH2O (L = tmen (N,N,N′,N′-tetramethylethane-1,2-diamine), x = 0.5; L = trimeen (N,N,N′-trimethylethane-1,2-diamine), x = 1; L = dien (N-(2-aminoethyl)ethane-1,2-diamine), x = 0; L = medpt (N-(3-aminopropyl)-N-methylpropane-1,3-diamine), x = 2) have been isolated from the reaction mixture of Cu(ClO4)2·6H2O (or CuCl2·2H2O), the amine and Na2 [Fe(CN)5NO]·2H2O in water. The complexes have been characterized by infrared and ultraviolet–visible spectroscopies, and magnetic measurements. Single-crystal X-ray structural analysis revealed that the [Cu(1,2-pn)2Fe(CN)5NO]·H2O complex assumes a cyanide-bridged binuclear structure in which iron(II) is six-coordinated by five cyanide ligands and one nitrosyl group (the nitrosyl group lies cis to the bridging cyanide group), while copper(II) is five-coordinated by two propane-1,2-diamine ligands and a bridging cyanide ligand in a distorted tetragonal pyramidal arrangement.

Unsymmetrical Dirhenium Complexes That Contain [Re2]6+and [Re2]5+Cores Complexed by Tridentate Ligands with P2O and P2N Donor Sets

2002 ◽  
Vol 41 (2) ◽  
pp. 405-412 ◽  
Author(s):  
Shan-Ming Kuang ◽  
Phillip E. Fanwick ◽  
Richard A. Walton
Keyword(s):  
Tridentate Ligands ◽  
Dirhenium Complexes

Dimethylplatinum(IV) Complexes With Cyanide: Thermal and Photoassisted Substitution Reactions, and Characterization of Products by N.M.R.

1987 ◽  
Vol 40 (9) ◽  
pp. 1565 ◽  
Author(s):  
TG Appleton ◽  
JR Hall ◽  
MA Williams
Keyword(s):  
Ultraviolet Irradiation ◽  
Oxidative Addition ◽  
Reductive Elimination ◽  
Methyl Groups ◽  
Substitution Reactions ◽  
Aqueous Acid ◽  
Cyanide Ligands ◽  
Cis And Trans ◽  
Insoluble Precipitate

Reactions of cyanide with the dimethylplatinum (IV) complexes, [PtMe2(OH) (H20)1.5 n, [PtMe2Br2]n and fac-PtMe2Br(H2O)3+, have been studied, principally by 1H, 13C and 195Pt n.m.r. Cyanide rapidly displaces the ligands trans to the methyl groups. Subsequent reactions cis to the methyl groups occur more slowly with heating, or, for bromo complexes, on ultraviolet irradiation. These substitution reactions compete with reductive elimination of groups from the platinum(IV) compounds to produce platinum(II) products. All attempts to prepare solutions of fac-PtMe2(CN)(H2O)3+ were unsuccessful. Oxidative addition of ICN to cis-PtMe2( py )2 ( py = pyridine) gave PtMe2I(CN)( py )2, from which a solution of fac-PtMe2(CN)( MeOH )3+ in methanol could be obtained. Addition of water or aqueous acid to this solution gave a very insoluble precipitate of [PtMe2(CN)(OH)n. The cis and trans influences on Jpt -C and δC of the cyanide ligands have been evaluated.

A New One-Dimensional Bimetallic Complex: Cu(en)2Fe(CN)5(NO). Synthesis, Crystal Structure and Magnetic Behaviour

1998 ◽  
Vol 51 (8) ◽  
pp. 661 ◽  
Author(s):  
Hui-Zhong Kou ◽  
Hong-Mei Wang ◽  
Dai-Zheng Liao ◽  
Peng Cheng ◽  
Zong-Hui Jiang ◽  
...  
Keyword(s):  
Copper Complexes ◽  
Bond Distance ◽  
Chain Structure ◽  
Magnetic Behaviour ◽  
Teller Distortion ◽  
Magnetic Investigation ◽  
Jahn Teller ◽  
Cyanide Ligands ◽  
Jahn Teller Distortion ◽  
Shed Light

The nitrosyl cyanide Cu(en)2Fe(CN)5(NO) was prepared by the reaction of Cu(en)2Cl2 and Na2 [Fe(CN)5(NO)].2H2O in aqueous solution. Single-crystal X-ray structure analysis revealed that the complex assumes a cyanide-bridged chain structure in which iron(II) is coordinated by five cyanide ligands and a nitrosyl group, and copper(II) is coordinated by two ethylenediamine ligands and two bridging cyanide ligands. The copper centres display a typical Jahn–Teller distortion characteristic of octahedral copper complexes with bond distance deviations in lattice symmetry from octahedral ideality: Cu-N(equatorial, mean) 2·010(3) Å and Cu-N(axial, mean) 2·569(3) Å. Infrared and ultraviolet studies shed light on the above molecular structure. A magnetic investigation showed the presence of a weak antiferromagnetic interaction (J = -1·06 cm-1) between the copper atoms within each chain through the diamagnetic Fe(CN)5(NO)2- ions.

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