Completely stereoselective synthesis of a chiral quadridentate ligand with As2NP donor atoms. Crystal and molecular structure of [OC-6,35-(R*,S*)]-(±)-dichloro{1-[(2-dimethylarsinophenyl)methylarsino]-2-[(2-aminophenyl)methylphosphino]benzene-As, As′,N,P}cobalt(III) chloride dihydrate

1994 ◽  
pp. 1587-1588 ◽  
Author(s):  
Roy J. Doyle ◽  
Geoffrey Salem ◽  
Anthony C. Willis
Keyword(s):  
Molecular Structure ◽  
Stereoselective Synthesis ◽  
Crystal And Molecular Structure ◽  
Chloride Dihydrate

The crystal and molecular structure of bis(biguanide)copper(II) chloride dihydrate

1983 ◽  
Vol 77 ◽  
pp. L113-L115 ◽  
Author(s):  
Colin H.L. Kennard ◽  
Graham Smith ◽  
Eric J. O'Reilly
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Chloride Dihydrate

Stereoselective Synthesis of a Phenylphosphido-Bridged Dimetallic Complex: Crystal and Molecular Structure of [(R̲*,R̲*),(R̲*)]-(±)-[η5-C5H5){1,2-C6H4(PMePh)2}FePHPh{Cr(CO)5}] · 2 H2O · 0.5 CH2Cl2 · 0.5 C4H8O

1989 ◽  
Vol 44 (9) ◽  
pp. 1041-1046 ◽  
Author(s):  
Evamarie Hey ◽  
Anthony C. Willis ◽  
S. Bruce Wild
Keyword(s):  
Molecular Structure ◽  
Stereoselective Synthesis ◽  
Crystal And Molecular Structure ◽  
Iron Complex ◽  
Unit Cell ◽  
Dissimilar Metals ◽  
Triclinic Space Group ◽  
Space Group ◽  
Lattice Constants ◽  
Complex Crystal

Deprotonation of (R̲*,R̲*)-(±))-[η5-C5H5){1,2-C6H4(PMePh)2}Fe(PH2Ph)]PF6 with n-BuLi in tetrahydrofuran at 20°C, followed by treatment of the intermediate phenylphosphido-iron complex with [Cr(CO)5(NMe3)] produces a separable 3: 2 mixture of the diastereomers [(R̲*,R̲*),(R̲*)]- and [(R̲*,R̲*),(S̲*)]-(±)-[(η5-C5H5){1,2-C6H4(PMePh)2}Fe-PH(Ph) → Cr(CO)5]. The major component of the mixture crystallizes from dichloromethane-tetrahydrofuran in the atmosphere as the mixed solvate (R̲*,R̲*)-(±))-[η5-C5H5){1,2-C6H4(PMePh)2}Fe(PH2Ph)]Fe-PH(Ph) → Cr(CO)5]· 2 H2O-0.5 CH2Cl2 · 0.5 C4H8O in the triclinic space group P1̅ with two formula units in the unit cell; the lattice constants are a = 10.933(2) Å, b = 13.161(4) Å, c = 15.249(3) Å, α = 76.83(1)°, β = 75.62(3)°, and γ = 79.31(1)°. In the structure, the pyramidal phenylphosphido group bridges the dissimilar metals via relatively long metal-phosphorus bonds, viz., Fe-P = 2.285(5) Å, Cr-P = 2.511(4) Å.

Crystal and molecular structure of bis(o-phenylenethiourea)selenium(II)chloride dihydrate, C14H12N4S2Cl2Se�2H2O

1989 ◽  
Vol 19 (3) ◽  
pp. 465-473
Author(s):  
Sp. Chidambaram ◽  
G. Aravamudan ◽  
V. Ganesh ◽  
M. Seshasayee ◽  
T. A. Sibanova ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Chloride Dihydrate

Crystal and molecular structure of trans-diamminebis(N-methylimidazole)platinum(II) chloride dihydrate, trans-[Pt(NH3)2(N2C4H6)2]Cl2.2H2O

1972 ◽  
Vol 11 (5) ◽  
pp. 1117-1120 ◽  
Author(s):  
J. W. Carmichael ◽  
N. Chan ◽  
A. W. Cordes ◽  
Caroline K. Fair ◽  
D. A. Johnson
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Chloride Dihydrate

scholarly journals The Chiral 1:2 Adduct (S)S(S)C(−)589-Ethyl 2-Phenylbutyl Sulphide-Mercury (II) Chloride:(−)589[(S)S(S)C-Et(2-PhBu)S.(HgCl2)2]. Stereoselective Synthesis, Asymmetric Oxidation, Crystal and Molecular Structure and Circular Dichroism Spectra

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3398
Author(s):  
Paolo Biscarini ◽  
Ivano Bilotti ◽  
Francesco Ferranti ◽  
Alessia Bacchi ◽  
Giancarlo Pelizzi ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Circular Dichroism ◽  
Stereoselective Synthesis ◽  
Crystal And Molecular Structure ◽  
Cotton Effect ◽  
Coordination Polyhedra ◽  
Asymmetric Oxidation ◽  
Complex Ii ◽  
A Charge ◽  
Circular Dichroïsm

Optically active (−)589ethyl (S)-2-phenylbutyl thioether, (−)(S)C-Et(PhBu)S (I), and its new diastereoisomeric mercury (II) chloride adduct, 1:2, (−)[(S)S(S)C-Et(PhBu)S.(HgCl2)2]2, (II) were stereoselectively synthesized; the absorbance (UV) and circular dichroism (CD) spectra were measured and the crystal and molecular structure of complex (II) was determined by single-crystal X-ray diffraction. Two different Hg centres are present whose coordination environments are built by two short bonds to chloride ligands in one case, and to one chloride and one sulphur in the other one. These originate digonal units. Electroneutrality is achieved by a further chlorine, which can be considered prevalently ionic and bonded to the two Hg centres, forming square bridging systems nearly perpendicular to the digonal molecules. The coordination polyhedra can be interpreted as 2 + 4 tetragonally-compressed octahedra with the four longer contacts lying in the equatorial plane. IR spectroscopic data are consistent with the presence of one bent and one linear Cl–Hg–Cl moiety. The absolute configurations at both stereogenic centres of the formed diastereoisomeric complex (II) are (S). The (S)S absolute configuration at the stereogenic sulphur atom bonded to the mercury(II) atom in complex (II) has been related with the negative Cotton effect assigned in its circular dichroism (CD) spectrum to a charge-transfer transition at ca. 230 nm. The stereoselective oxidation of (I) and (II) with hydrogen peroxide, induced by the stereogenic carbon atom (S)C of the enantiopure sulphide, gave (−)598ethyl (S)C-2-phenylbutyl(S)S-sulphoxide, (−)598[(S)S(S)C-Et(PhBu)SO], (III), having 18.1% de. Oxidations carried out in the presence of a 200 molar excess of mercury(II) chloride gave (−)598ethyl (S)C-2-phenylbutyl(R)S-sulphoxide, (−) 598[(R)S(S)C-Et(PhBu)SO], (IV) with 31% de, showing the cooperative influence of mercury(II) chloride on the selectivity of the oxidation reaction.

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