Substituents Effect on Molecular Structures of 13-Vertex closo-Metallacarboranes of Rare Earths. Synthesis and Structural Characterization of Metallacarboranes Bearing nido- and arachno-Carborane Ligands.

ChemInform ◽  
2004 ◽  
Vol 35 (14) ◽  
Author(s):  
Shaowu Wang ◽  
Yaorong Wang ◽  
Mak-Shuen Cheung ◽  
Hoi-Shan Chan ◽  
Zuowei Xie
Keyword(s):  
Structural Characterization ◽  
Rare Earths ◽  
Molecular Structures

Monoorganoantimony(v) phosphonates and phosphoselininates

2016 ◽  
Vol 45 (14) ◽  
pp. 6269-6274 ◽  
Author(s):  
Uppara Ugandhar ◽  
Viswanathan Baskar
Keyword(s):  
Solid State ◽  
Structural Characterization ◽  
Molecular Structures ◽  
Spectral Studies ◽  
Mass Spectral

Synthesis and structural characterization of novel tetra- and dinuclear organoantimony oxo-hydroxo clusters ligated by phosphonates and phosphonates/selininates are reported. Mass spectral studies reveal that the solid state molecular structures of these clusters were retained in solution as well.

Molecular structures of a series of substituted bis(η5-cyclopentadienyl)titanium dihalides Cp R 2TiX 2 [X = F, Cl, Br and I; R = CHPh2, CH(p-Tol)2 and adamantyl]

2018 ◽  
Vol 74 (4) ◽  
pp. 442-451 ◽  
Author(s):  
Tim Oswald ◽  
Nicolai Lauterbach ◽  
Marc Schmidtmann ◽  
Rüdiger Beckhaus
Keyword(s):  
Structural Characterization ◽  
Antitumor Agents ◽  
Molecular Structures ◽  
Exchange Reactions ◽  
Titanium Complexes ◽  
Hydrogen Halides ◽  
Metathesis Reactions

Metallocene dihalides and derivatives thereof are of great interest as precursors for catalysts in polymerization reactions, as antitumor agents and, due to their increased stability, as suitable starting materials in salt metathesis reactions and the generation of metallocene fragments. We report the synthesis and structural characterization of a series of eleven substituted bis(η5-cyclopentadienyl)titanium dihalides, namely bis[η5-1-(diphenylmethyl)cyclopentadienyl]difluoridotitanium(IV), [Ti(C18H15)2F2], bis{η5-1-[bis(4-methylphenyl)methyl]cyclopentadienyl}difluoridotitanium(IV), [Ti(C20H19)2F2], and bis{η5-1-[bis(adamantan-2-yl)methyl]cyclopentadienyl}difluoridotitanium(IV), [Ti(C15H19)2F2], together with the bromide and iodide analogues, and the chloride analogues of the diphenylmethyl and adamantyl complexes. These eleven complexes were prepared by the reaction of the corresponding bis(η5:η1-pentafulvene)titanium complexes with different hydrogen halides (Cl, Br and I). The titanocene fluorides become available via chloride–fluoride exchange reactions.

Synthesis and Structural Characterization of Palladium Dicarbene Complexes Bearing Labile Co-Ligands

2009 ◽  
Vol 62 (9) ◽  
pp. 983 ◽  
Author(s):  
Han Vinh Huynh ◽  
Hui Xian Seow
Keyword(s):  
Single Crystal ◽  
Structural Characterization ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
Metathesis Reaction ◽  
X Ray ◽  
Low Activity

Dicarbene complexes [Pd(OAc)2(diNHC)] (2), [Pd(O2CCF3)2(diNHC)] (3), and [Pd(CNCH3)2(diNHC)](SO3CF3)2 (4) bearing labile acetato, fluoroacetato, and acetonitrile co-ligands have been synthesized via metathesis reaction of the respective precursor [PdBr2(diNHC)] (1) with Ag-salts. All complexes are stable towards air and moisture and have been fully characterized by spectroscopic and spectrometric methods. Notably and in comparison to diphosphine analogues, they resist ligand disproportionation in solution. Their molecular structures have also been determined by single crystal X-ray diffraction. A preliminary catalytic study showed low activity in the hydroamination reaction, but revealed an interesting co-ligand influence.

scholarly journals Crystal structures of two new six-coordinate iron(III) complexes with 1,2-bis(diphenylphosphane) ligands

2018 ◽  
Vol 74 (6) ◽  
pp. 803-807
Author(s):  
Derek L. McNeil ◽  
Daihlia J. Beckford ◽  
Jared L. Kneebone ◽  
Stephanie H. Carpenter ◽  
William W. Brennessel ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Structural Characterization ◽  
Molecular Structures ◽  
Mass Ratio ◽  
Triclinic Space Group ◽  
Space Group ◽  
Ionic Complexes ◽  
Π Interactions ◽  
Centrosymmetric Space Group

Structural characterization of the ionic complexes [FeCl2(C26H22P2)2][FeCl4]·0.59CH2Cl2 or [(dppen)2FeCl2][FeCl4]·0.59CH2Cl2 (dppen = cis-1,2-bis(diphenylphosphane)ethylene, P2C26H22) and [FeCl2(C30H24P2)2][FeCl4]·CH2Cl2 or [(dpbz)2FeCl2][FeCl4]·CH2Cl2 (dpbz = 1,2-bis(diphenylphosphane)benzene, P2C30H24) demonstrates trans coordination of two bidentate phosphane ligands (bisphosphanes) to a single iron(III) center, resulting in six-coordinate cationic complexes that are balanced in charge by tetrachloridoferrate(III) monoanions. The trans bisphosphane coordination is consistent will all previously reported molecular structures of six coordinate iron(III) complex cations with a (PP)2 X 2 (X = halido) donor set. The complex with dppen crystallizes in the centrosymmetric space group C2/c as a partial-occupancy [0.592 (4)] dichloromethane solvate, while the dpbz-ligated complex crystallizes in the triclinic space group P1 as a full dichloromethane monosolvate. Furthermore, the crystal studied of [(dpbz)2FeCl2][FeCl4]·CH2Cl2 was an inversion twin, whose component mass ratio refined to 0.76 (3):0.24 (3). Beyond a few very weak C—H...Cl and C—H...π interactions, there are no significant supramolecular features in either structure.

Sign in / Sign up

Export Citation Format

Share Document