The phosphinomethylsilyl group as a bifunctional bridging ligand. X-Ray crystal structure of hexacarbonylbis(µ-diphenylphosphino-methyldimethylsilyl)diruthenium(II), and of its reaction product with trifluoroacetic acid, a mononuclear ruthenium(II) complex incorporating a unique co-orinated silanol

1983 ◽  
pp. 1523-1525 ◽  
Author(s):  
Mary J. Auburn ◽  
Rupert D. Holmes-Smith ◽  
Stephen R. Stobart ◽  
Michael J. Zaworotko ◽  
T. Stanley Cameron ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Trifluoroacetic Acid ◽  
X Ray ◽  
Bridging Ligand

Chemical transformation of 1,2-oxazinochlorin derivatives: synthesis and X-ray crystal structure of a novel porphyrin-porphyrin dimer with a condensed cyclohexane ring

2007 ◽  
Vol 11 (01) ◽  
pp. 31-41 ◽  
Author(s):  
Yuliya V. Morozova ◽  
Dmitry V. Yashunsky ◽  
Zoya A. Starikova ◽  
Gelii V. Ponomarev
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Chemical Transformation ◽  
Trifluoroacetic Acid ◽  
Ring Opening ◽  
Nickel Complex ◽  
Cyclohexane Ring ◽  
X Ray ◽  
Reagent Treatment ◽  
Porphyrin Dimer

Base-assisted ring opening in 1,2-oxazinochlorin derivatives led selectively to the corresponding meso-cyanohydroxychlorin derivatives. The latter could then undergo acid-mediated carbocation formation followed by nucleophilic treatment to give different products, depending on the nature of the nucleophile reagent. Treatment of (E)- and/or (Z)-2-ethylidene-3-hydroxy-5-cyano-3,7,8,12,13,17,18-heptaethylchlorin nickel complex with a mixture of 5% trifluoroacetic acid and dichloromethane yielded a novel type porphyrin-porphyrin dimer with a condensed cyclohexane ring in an almost quantitative yield. The structure of this dimer was determined by single crystal X-ray analysis.

Kristallstruktur, Schwingungsspektren und Normalkoordinatenanalyse von trans-(Et4N)[OsF4Cl2] / Crystal Structure, Vibrational Spectra and Normal Coordinate Analysis of trans-(Et4N)[OsF4Cl2]

2000 ◽  
Vol 55 (8) ◽  
pp. 691-694 ◽  
Author(s):  
B. Lorenzen ◽  
W. Preetz
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Vibrational Spectra ◽  
Structure Determination ◽  
Trifluoroacetic Acid ◽  
Complex Anion ◽  
Normal Coordinate ◽  
Triclinic Space Group ◽  
X Ray ◽  
Ir And Raman

Abstract By careful oxidation of trans-tetrafluorodichloroosmate(IV) with PbO2/trifluoroacetic acid in dichloromethane the corresponding osmium(V) complex anion rran5 -[OsF4Cl2]- is for­ med. The X-ray structure determination on a single crystal has been performed of trans-(Et4N)[OsF4Cl2] (triclinic, space group P1̄a = 7.190(5), b = 7.205(5), c = 7.732(5) Å, a = 71.28(1), β = 71.32(1), 7 = 70.76(1)°, Z = 1). Based on the molecular parameters of the X-ray determination the IR and Raman spectra of the complex have been assigned by normal coordi­ nate analysis. The valence force constants are: fd(OsCl) = 2.13 and fd(OsF) = 3.81 mdyn/Å.

Synthesis and Crystal Structure of 4-[5-(2-Bromophenyl)-1,3,4-Thiadiazol-2-Ylthio]-2-(trifluoromethyl)thieno[2,3-d]pyrimidine

2014 ◽  
Vol 887-888 ◽  
pp. 703-706
Author(s):  
Ping Yang ◽  
Hui Gao ◽  
Yao Nie ◽  
Zhen Zeng ◽  
Jin Shun Zhao ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Trifluoroacetic Acid ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
H Nmr ◽  
Planar Conformation ◽  
Step Procedure ◽  
Title Molecule

4-[5-(2-Bromophenyl)-1,3,4-thiadiazol-2-ylthio]-2-(trifluoromethyl)thieno[2,3-d]pyrimidine was synthesized by a facile three-step procedure, including the cyclization of 2-aminothiophene-3-carbonitrile with trifluoroacetic acid, chlorination and nucleophilic substitution reaction. This protocol offers such advantages as mild reaction conditions, simple purification and good yields. The structure of the product was characterized by 1H NMR, MS, elemental analysis and single-crystal X-ray diffraction. X-Ray diffraction analysis reveals that the title molecule essentially assumes a planar conformation except for the F atoms.

3,3’’-Bis(saccharin-6-ylmethyl)-1,1’:3’,1’’-terphenyl – Precursor of A New Tetradendate Bis-bridging Ligand

2012 ◽  
Vol 67 (10) ◽  
pp. 1070-1080 ◽  
Author(s):  
Stefan Buck ◽  
Gerhard Maas
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Title Compound ◽  
Crystal Structure Analysis ◽  
X Ray ◽  
Bridging Ligand ◽  
Coordination Sites ◽  
Dinuclear Ruthenium

The title compound (H2tpsac) was synthesized from 6-bromosaccharin and 3,3’’-bis(bromomethyl)- m-terphenyl. The ability of tpsac to serve as a tetradentate bis-bridging ligand was demonstrated by the formation of the dinuclear ruthenium(I,I) complexes [Ru2(CO)5(μ,μ-tpsac)]2, [Ru2(CO)4(μ,μ-tpsac)]n, [Ru2(CO)4(PPh3)2(μ,μ-tpsac)], and [Ru2(CO)5(PPh3)(μ,μ-tpsac)]. An X-ray crystal structure analysis of [Ru2(CO)4(PPh3)2(μ,μ-tpsac)] showed the head-to-tail (or 1,1) arrangement of the two saccharinate coordination sites.

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