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71.
72.
Reactions of iron(II) and iron(III) salts with tri-p-tolylarsine oxide(L) in suitable organic solvents yield complexes of formulas: (i) [FeL2Cl2(OH2)2] [FeCl4].2H2O, [FeL2Br2] [FeBr4].2H2O; (ii) [Fe(NCS)3L2].H2O; (iii) [FeL(O2ClO2)2(OH2)] (ClO4).0.25C6H6; (iv) [FeL3I] [FeI3].H2O and (v) [Fe(CO)3LI]I. Characterization has been done through elemental analyses, IR, far IR, ESR, and reflectance spectra, molar conductance, magnetic moments, t.g.a. and X-ray diffraction (powder) data. The species [FeL2Cl2(OH2)2]+, [FeL2Br2]+, [Fe(NCS)3L2], [FeL(O2ClO2)2OH2]+, [FeL3I]+ and [Fe(CO)3LI]+ have been assigned trans-octahedral, trans-square planar, trans-trigonal bipyramid, trans-octahedral, tetrahedral and cis-trigonal bipyramid structures respectively. 相似文献
73.
Lobana TS Sultana R Butcher RJ 《Dalton transactions (Cambridge, England : 2003)》2011,40(43):11382-11384
2-Mercapto-1-methyl-imidazoline (N(2)C(4)H(6)S) is converted at room temperature into 2-bromo-1-methyl-imidazole (N(2)C(4)H(5)Br) in presence of copper(I) bromide in acetonitrile-chloroform mixture via extrusion of sulfur as sulfate and oxidation of Cu(I) into Cu(II). 2-Bromo-1-methyl-imidazole was isolated as its self assembled tetranuclear Cu(II) cluster, [Cu(4)(η(1)-N-(N(2)C(4)H(5)Br)(4)(μ(4)-O)(μ-Br)(6)] 1 {η(1)-N-(N(2)C(4)H(5)Br) = 2-bromo-1-methyl-imidazole}. 相似文献
74.
Rakesh Kumar Mahajan Rajiv Kumar Puri Gagandeep Bawa Tarlok Singh Lobana 《无机化学与普通化学杂志》2008,634(9):1626-1632
A ruthenium(II) complex [Ru(PPh3)2(pytsc)2] {Hpytsc = pyridine‐2‐carbaldehydethiosemicarbazone, (C5H5N)C2(H)=N3‐N2(H)‐C1(=S)N1H} has been used as an ion carrier for the selective determination of silver(I) ions in solution. Silver(I) ion‐selective coated graphite based (CGE) and PVC polymeric membrane based (PME) electrodes exhibit Nernstian slope for silver(I) ions over a wide concentration range from 1.0 × 10−1 M to 5.0 × 10−6 M (with CGE) and 1.0 × 10−1 M to 2.0 × 10−5 M (with PME). The working pH range of these electrodes has been found to be from 1.2 to 7.2 for CGE and 2.2 to 6.5 for PME. The proposed CGE sensor exhibits better analytical features like sensitivity and selectivity towards different secondary ions in comparison to the corresponding PME with no interference from mercury(II) ions . These electrodes also act as indicator electrodes in potentiometric titration and have been successfully used for the determination of silver content in solution of real samples (1 gm dissolved in 100 mL of dilute nitric acid) such as silver ornaments and thin silver foils. Silver content determined by the use of ion selective electrode was found to vary in the concentration range from 1.20 x 10−2 M to 7.45 x 10−2 M and results were found to be comparable with those obtained from the traditional volumetric method of analysis. It is the first report of a metal‐ligand complex used as an ion carrier in ion selective electrode, which is selective for a metal ion other than the one used in the complex. 相似文献
75.
Tarlok S. Lobana Prof. Parminderjit Kaur Geeta Hundal Ray J. Butcher Alfonso Castineiras 《无机化学与普通化学杂志》2008,634(4):747-753
Reactions of pyrimidine‐2‐thione (HpymS) with PdII/PtIV salts in the presence of triphenyl phosphine and bis(diphenylphosphino)alkanes, Ph2P‐(CH2)m‐PPh2 (m = 1, 2) have yielded two types of complexes, viz. a) [M(η2‐N, S‐ pymS)(η1‐S‐ pymS)(PPh3)] (M = Pd, 1 ; Pt, 2 ), and (b) [M(η1‐S‐pymS)2(L‐L)] {L‐L, M = dppm (m = 1) Pd, 3 ; Pt, 4 ; dppe (m = 2), Pd, 5 ; Pt, 6 }. Complexes have been characterized by elemental analysis (C, H, N), NMR spectroscopy (1H, 13C, 31P), and single crystal X‐ray crystallography ( 1 , 2 , 4 , and 5 ). Complexes 1 and 2 have terminal η1‐S and chelating η2‐N, S‐modes of pymS−, while other Pd/Pt complexes have only terminal η1‐S modes. The solution state 31P NMR spectral data reveal dynamic equilibrium for the complexes 3 , 5 and 6 , whereas the complexes 1 , 2 and 4 are static in solution state. 相似文献
76.
Tarlok S. Lobana Prof. Renu Sharma Rekha Sharma Razia Sultana R. J. Butcher 《无机化学与普通化学杂志》2008,634(4):718-723
Reactions of divalent Zn‐Hg metal ions with 1,3‐imidazolidine‐2‐thione (imdtH2) in 1 : 2 molar ratio have formed monomeric complexes, [Zn(η1‐S‐imdtH2)2(OAc)2] ( 1 ), [Cd((η1‐SimdtH2)2I2] ( 2 ), [Cd(η1‐S‐imdtH2)2Br2] ( 3 ), and [Hg(η1‐S‐imdtH2)2I2] ( 4 ). Complexes 1 – 4 , have been characterized by elemental analysis (C, H, N), spectroscopy (IR, 1H, NMR) and x‐ray crystallography ( 1 ‐ 4 ). Hydrogen bonding between oxygen of acetate and imino hydrogen of ligand, {N(2)–H(2C)···O(2)#} in 1 , ring CH and imino hydrogen, {C(2A)–H(2A)···Br(2)#} in 3 have formed H‐bonded dimers. Similarly, the interactions between molecular units of complexes 2 and 4 have yielded 2D polymers. The polymerization occurs via intermolecular interactions between thione sulfur and imino hydrogen, {N(2)–H(2)···S(1)#}, imino hydrogen and the iodine atom, {NH(1)···I(2)#} in 2 and imino hydrogen – iodine atom {N(2A)–H(2A)···I(2)} and I···I interaction in 4 . Crystal data: [Zn(η1‐S‐imdtH2)2(OAc)2] ( 1 ), C10H18N4O4S2Zn, orthorhombic, Pbcn, a = 9.3854(7) Å, b = 12.4647(10) Å, c = 13.2263(11) Å; V = 1547.3(2) Å3, Z = 4, R = 0.0280 [Cd((η1‐S‐imdtH2)2I2] ( 2 ), C6H12CdI2N4S2, orthorhombic, Pnma, a = 13.8487(10) Å, b = 14.4232(11) Å, c = 7.0659(5) Å; Z = 4, V = 1411.36(18) Å3, R = 0.0186. 相似文献
77.
Prof. Dr. Tarlok S. Lobana Poonam Kumari Ray J. Butcher Jerry P. Jasinski James A. Golen 《无机化学与普通化学杂志》2012,638(11):1861-1867
Reactions of copper(II) acetate with N1‐subsitituted salicylaldehyde thiosemicarbazones [R1R2C2=N3–N2H–C1(=S)–N1HR3;R1 = 2‐HO–C6H4–, R2 = H : R3 = Me (H2L1), Et (H2L2)] are described. Copper(II) acetate was reacted with H2L1 and H2L2 ligands in the presence of polypyridyl co‐ligands, and this led to the formation ofmononuclear complexes, [Cu(κ3‐O, N, S‐L1)(κ2‐N, N‐bipy)] ( 1 ),[Cu(κ3‐O, N, S‐L)(κ2‐N, N‐phen)] [L = L1 ( 3 ), L2 ( 4 )], [Cu(κ3‐O, N, S‐L)(κ2‐N, N‐tmphen)] [L =L1 ( 5 ), L2 ( 6 )] and a dinuclear complex, [Cu2L22(bipy)] ( 2 ) (bipy = 2, 2′‐bipyridine, phen = 1, 10‐phenanthroline, tmphen = 3, 4, 7, 8‐tetramethyl‐1, 10‐phenanthroline). In dinuclear complex 2 , one ligand is O, N3,S‐chelating, while second is O, N3,S‐chelation‐cum‐N2‐bridging; and in all others thio‐ligands are O, N3,S‐chelating. The μeff values for the complexes lie in the range of 1.79–1.83 BM. Complexes 1 , 3 – 6 have square pyramidal arrangement, whereas complex 2 has two independent molecules in the crystal lattice, and each molecule has trigonal bipyramidal square planar (5:4) coordination pair. Complexes 2 , 4 , and 6 showed fluorescence properties. 相似文献