scispace - formally typeset
Search or ask a question

Showing papers in "Polyhedron in 1985"


Journal ArticleDOI

325 citations





Journal ArticleDOI
TL;DR: In this article, the basic and basic properties of benzylic protons vs aromatic protons are compared. And the effect of dipole moments and inductive effects on the stability of positive and negative charge in a positive charge in zor /?-position.

105 citations


Journal ArticleDOI
TL;DR: A systematic literature review is provided of CS ligand-preparative methods used to form thiocarbonyl complexes between 1812 and 1814, and their applications in Fe triad, Mntriad, and Cotriad.

90 citations


Journal ArticleDOI
TL;DR: In this article, aqueous Na 10 [H 2 W 12 O 42 ]·27H 2 O (1), Na 6 [W 7 O 24 6− 183 W NMR spectrum shows three resonances with the chemical shifts + 269.2, −98.8 and −178.9 ppm relative to WO 4 2− and intensity ratio 1:4:2.14 have been measured.

75 citations


Journal ArticleDOI
TL;DR: In this article, 16 complexes of general formula R2SnL2 and R2(L)SnOSnR2 (where L = N-acetyl-L-leucine or Nacetyl)-L-phenylalanine) have been prepared by interaction between the ligand and R 2SnO in 2:1 or 1:1 molar ratio.

68 citations


Journal ArticleDOI
TL;DR: In this article, the 1,3-dipolar cycloreversion pathway of the pentazole anion (N 5 − ) to the azide anion plus dinitrogen (N 2 ) has been investigated using ab initio methods.

62 citations


Journal ArticleDOI
TL;DR: In this article, the X-ray photoelectron spectra of 14 complexes of Al3+, Cr 3+, Fe3+, Co3+ and Cu2+ with 3-X-2,4-pentanedione (X = H, Cl, Br) were determined to analyse the nature of metal-ligand bonding in these complexes.

61 citations


Journal ArticleDOI
TL;DR: In this paper, the diamagnetic Roussin esters Fe 2 (SR) 2 (NO) 4 readily underwent exchange with thiols R′SH to yield Fe 2(SR′) 2(NO)4 : the exchange was faster in polar, coordinating solvents where paramagnetic, mononuclear complexes of types [Fe(NO)-2 (solvent) 2 ] + and Fe(NO)(solvent), were formed.

Journal ArticleDOI
TL;DR: In this paper, the nature of the 8-quinolinato ligand in various forms has been examined by 15N, 13C and 119Sn NMR spectroscopy, with evidence also from ECS.

Journal ArticleDOI
TL;DR: In this article, it was shown that the coordinated methanol is involved in H-bonding with the monodentate trifluoroacetate ligand and showed that the coordination of the methanoline-adduct intermediate has been determined by X-ray diffraction methods.

Journal ArticleDOI
TL;DR: In this article, the coordination mode of a commercial chelating ion exchange resin, ES 467, containing aminomethylphosphonic acid groups anchored on a macroporous styrenedivinylbenzene copolymer, with several metal ions, such as chromium(III), cobalt(II), nickel (II), copper(II) and zinc(II)), was studied with the aid of IR, ligand field and ESR spectra.


Journal ArticleDOI
John Milne1
TL;DR: The nature of 2/1 Cl/Se and Br/Se stoichiometric mixtures in acetonitrile has been studied by UV-visible and Raman spectroscopy as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this article, an X-ray crystal structure determination showed that the anion consists of a tetrahedron of metal atoms, each carrying a terminal -SC6H5 ligand.

Journal ArticleDOI
TL;DR: In this article, the synthesis of the novel ligand 2,2,7-trimethyl-3,5-octanedione, H(tod), was described, as well as the preparation of some of the transition metal and lanthanide complexes containing the anion of this unsymmetrical beta-diketone ligand.

Journal ArticleDOI
TL;DR: In this paper, the visible and ESR spectra of copper(II) complexes with 2-(acetylamino)benzoic acid, 2-(benzoylamino), benzoic acids, 2-aminobenzanilide, 2(aminobenzoyl), maleanilic acid and malea-1-naphthalanilic acids have been tentatively assigned dimeric structures.

Journal ArticleDOI
TL;DR: Some five and six-coordinated di-and tri-n-butyl tin(IV) complexes have been synthesized and characterised on the basis of microanalyses, molecular weight determinations, IR, NMR (1H, 13C, 119Sn) and 119Sn Mossbauer spectroscopy as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this paper, the condition of reliable demetalation of γ,γ′-dibenzoylated complexes by means of gaseous HCl is described, and all new compounds are characterized by elemental analysis, IR, 1H NMR and MS data.

Journal ArticleDOI
TL;DR: In this article, metal(II) complexes of N-(thiophene-2-carboxamido)salicylaldimine (H2TCS) of types M(HTCS)-2Cl2 [M = Ni, Cu, Zn, Co, Ni and Zn] have been prepared and different modes of chelation of the ligand and the stereochemistry of the complexes are discussed.

Journal ArticleDOI
TL;DR: In this article, the reduction potential of the [Ti(IV)]/[Ti(III) ratio in solutions of titanium(IV) chloride equilibrated with H2(g), at 25°C in 3 M (Na)Cl ionic medium, have indicated the predominance of the Ti(OH)22+ species in the concentration ranges 0.7 ± 0.5 ⩽ [H+]⩽ 2 M and 1.05 M.

Journal ArticleDOI
TL;DR: In this paper, the properties of diamagnetic and nonconducting diamagnetic dithiocarbamate complexes have been characterized by chemical analyses, conductance measurements, electronic and IR spectral studies, magnetic measurements and thermal analyses.

Journal ArticleDOI
TL;DR: In this paper, a general group-theoretical criterion, based on the pairing principle in Stone's tensor surface harmonic (TSH) theory, is presented for symmetry-induced departures from the ( n + 1) rule.

Journal ArticleDOI
TL;DR: In this paper, it was shown that (C6F5)3SbCl2 with appropriate metallic salts yield covalent pentacoordinate disubstituted products (V, VII-XII) of the general formula, (C 6F5, 3SbY2 (Y = NCS, NCO, −ONCMe2, −onCMePh −NCO(CH 2 ) 2 C O and p-NO2C6H4OCO), which are also accessible by displacement reaction of (I or (II

Journal ArticleDOI
TL;DR: In this paper, a systematic study of the synergic extractions of metals with mixtures of acidic chelating extractants and lipophilic anion-exchangers (B, X with X − 6 inorganic anion) was conducted.

Journal ArticleDOI
TL;DR: In this paper, the synthesis of two-dimensional triazole compounds is described, including the crystal structure of [Co(NCS)2(btr)2]H2O [btr stands for 4,4′-bis-1,2,4-triazole (C4H4N6)].

Journal ArticleDOI
TL;DR: In this article, the Ga2X4 · 2L (L = pyridine, 3-methylpyridine) and Ga2Cl4 4 · 2pyridines have been synthesized.

Journal ArticleDOI
TL;DR: In this paper, the extraction of Cu(II) with 1-phenyl-3-methyl-4-acyl-5-pyrazolone (HA) in different organic solvents has been studied.