23 Result(s)
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M. Sakhawat Hussain
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Article
Gold(I) complexes with tertiary phosphine sulfide ligands
Phosphine sulfides and their gold(I) complexes with general formula R3P=S—Au—X (X = Cl−, Br− or CN−) were prepared and characterized by elemental analyses, i.r. and 31P-n.m.r. spectroscopy. A decrease in the i.r....
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Article
Spectroscopic study of phosphine selenide complexes of Au(I) and X-ray structure of [(cyclohexyl)3PSeAuBr]
The X-ray structure determination of the complex, [(cyclohexyl)3PSe-AuBr], revealed a triclinic space group P-1, with a = 9.7654(7), b = 10.9441(9), c = 11.2064(9) Å, α = 117.076(6)°, β = 99.076(6)° γ = 95.417(6)...
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Article
The crystal and molecular structure of trans-dimethyl 2α-methyl(3αH) perhydro [1,2]oxazolo-[2,3-a]azepine-2α,3α-dicarboxylate: A 7/5-fused ring system
The title compound crystallizes in the monoclinic space group P21/n, with a = 6.225(1), b = 14.612 (1), c = 15.520 (1) Å, β = 96.6(3)°, Z = 4 and V = 1402.4Å3. The stereochemistry of the 7/5-fused ring system is
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Article
Synthesis of thionato(trimethylphosphine)gold(I) complexes
New compounds of formula [AuL(PMe3)]Cl [L = imidazolidine-2-thione (Imt), 1,3-diazinane-2-thione (Diaz), 1,3-diazepine-2-thione (Diap) and their derivatives] have been synthesized and characterized by elemental a...
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Article
[N(PPh3)2]2[{Au3Ag2(C2Ph)6} {Au3Cu2(Cu2Ph)6}]: Co-crystallized pentanuclear bimetallic gold-silver and gold-copper clusters
The X-ray structural study of the reaction product of equimolar amounts of [Au3Cu2(C2Ph)6]. [{Au(C2Ph)} n ], and [Ag(C2Ph)} n ] revealed two bim...
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Article
Intramolecular short hydrogen bond: the structure of benzenesulphonylhydrazone derivative of salicylaldehyde
The title compound crystallizes in the monoclinic space group P21/c, witha=10.449(2),b=11.555(1),c=10.854(2) Å, β=90.46(2)° andV=1310.3 Å3. ForZ=4 and F.W.=274.32 the calculated density is 1.39 g/cm3. The structu...
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Article
X-ray photoelectron spectroscopy and Fourier transform-infrared studies of transition metal phosphate glasses
X-ray photoelectron spectroscopy and Fourier transform-infrared studies were carried out on phosphate glasses containing oxides of iron, cobalt, nickel, copper and zinc. The results suggest that the glasses co...
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Article
The structure of 2-phenylperhydro-1,2-oxazolo[3,2-c] [1,4]oxazine
The title compound crystallizes in the monoclinic space group P21/n, witha=9.590(6),b=11.574(2),c=9.609(2) Å, β=105.72(3)o andZ=4. The structure was solved by direct methods and refined by full matrix least squar...
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Article
Crystal and molecular structure of (E)-2-t-butyl-3(3′-t-butyldimethylsiloxy)propyl-2-cyanocyclobutanone
The title compound crystallizes in the monoclinic space group P21/a, witha+12.906(9).b+11.604(2).c+14.631(9) Å, β=108.70(3)° andZ+4. The structure was solved by direct methods from diffractometer data and refined...
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Article
Cobalt(III) and chromium(III) complexes of thiosemicarbazide: the crystal structure of Λ-cis-tris(thiosemicarbazide)cobalt(III) chloride trihydrate
Cobalt(III) and chromium(III) complexes of thiosemicarbazide (Htsc) were prepared and the structure of [Co(Htsc)3]Cl3·3H2O was determined by X-ray crystallography. The structure was solved by direct methods and r...
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Article
Superconducting ceramics: preparation, XRD, SEM and EPR measurements to study the influence of compositional variations on superconductivity of La-(Ba/Sr/Ca)-CuO ceramic systems
A systematic substitution of strontium ions by barium and/or calcium ions in the 21-structure ternary oxide La1.85Sr0.15CuO4−y, considered as the host system in this study, was carried out to produce four- and fi...
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Article
Tetrahedral complexes of 1,2-dimorpholinoethane and 1,3-dimorpholinopropane: Crystal and molecular structure of dichloro(1,2-dimorpholinoethane)cobalt(II)
The ligands 1,2-dimorpholinoethane (DME) and 1,3-dimorpholinopropane (DMP) have been used to prepare Cu(II), Ni(II), Co(II), Hg(II), Zn(II), and Cd(II) complexes having the general formulationMLX 2 (L=DME and DMP...
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Article
Mixed-ligand complexes of copper(I) with heterocyclic thiones
Novel mixed-ligand copper(I) complexes of general formula [TPP−Cu−(L)Cl] or [TPPhos−Cu−(L)Cl], where TPP=triphenylphosphine, TPPhos=triphenylphosphate and L=imidazolidine-2-thione [Imt],N-propylimidazolidice-2-th...
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Article
Mixed-ligand complexes of gold(I) and silver(I) with heterocyclic thiones
Novel mixed-ligand complexes of Ag1 and Au1 containing triphenylphosphine (TPP) and heterocyclic thiones, of general formula [TPP−M−L]Cl and [(TPP)2−M−L]Cl, where L=imidazolidine-2-thione (Imt), 1,3-diazinine-2-t...
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Article
Cobaloxime derivatives: synthesis and spectroscopic studies of alpha-furilglyoximate of cobalt (III), X-ray structure of bis(thiourea)bis(alpha-furilglyoximato)cobalt(III) nitrate
α-Furilglyoxime (H2afdo) complexes of cobalt(III) were used to synthesize H2afdo-cobaloximes with thiourea, triphenylphosphine, and aniline astrans-axial ligands. Encapsulation of the H-bonded species with BF3∶O...
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Article
E.p.r. and spectroscopic studies of configurational changes in 1,4-diazacycloheptane copper(II) complexes
E.p.r. and spectroscopic studies of bis(1,4-diazacycloheptane)copper(II) perchlorate, bromobis(1,4-diazacycloheptane)copper(II) perchlorate and dibromo-bis(1,4-diazacycloheptane)copper(II), were carried out in...
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Article
Crystal and molecular structure of [(4-picolineN-oxide)2H]+ [AuCl4]−: A diadduct revealing a short hydrogen bond
The crystal structure of the [AuCl4]−-stabilized hydronium ion diadduct of 4-picolineN-oxide has been determined using 1388 reflections collected on a CAD4 diffractometer. The structure was refined to anR value o...
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Article
Carbon-13 N.m.r. and I.r. Studies of copper(I) complexes of the — NHCS group in five- and six-membered heterocyclic rings
Crystalline copper(I) complexes of the general formula [LCuCl] and [L2CuCl] were prepared for imidazolidine-2-thiones and 1,3-diazinane-2-thiones by the reduction of copper(II) halides with an excess of the ligan...
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Article
Spectroscopic, electrical and EPR studies of binary semiconducting oxide glasses containing 50 mol% V2O5
Recent measurements on the V2O5-GeO2 glass system consisting of an equimolar mixture of V2O5 and GeO2 revealed that increase in electrical conductivity of these glasses upon annealing could be attributed to the i...
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Article
The crystal structure and low temperature magnetic susceptibility of square-planar bis(1,5-diazacyclooctane)nickel(II) perchlorate dihydrate
We have carried out low temperature magnetic susceptibility measurements and a redetermination of the crystal and molecular structure of bis(1,5-diazacyclooctane)nickel(II) perchlorate dihydrate from three-dim...
