scispace - formally typeset
Search or ask a question

Showing papers in "Polyhedron in 1987"



Journal ArticleDOI
TL;DR: In this article, the preparation of pure metal(II) 4,9,16,23-phthalocyanine tetraamine 2-hydrates of copper, cobalt, nickel and zinc are reported.

179 citations



Journal ArticleDOI
TL;DR: In this article, the Anderson-type molybdopolyanions containing divalent metal ions (Zn, Cu, Co or Mn) as a heteroatom has been reinvestigated.

114 citations



Journal ArticleDOI

81 citations


Journal ArticleDOI
TL;DR: In this paper, it was shown that the energies of a wide variety of metal-metal-bonded molecules are adequately interpreted in terms of a simple zero-differential-overlap model that yields one-electron δ-δ* splittings of 5000-10,000 cm−1 and two-Electron exchange terms [K(δ, δ*)] of 5000 −8000 cm −1.

81 citations


Journal ArticleDOI
TL;DR: The reactions of the MM triple bonds in compounds of type Cp 2 M 2 (CO) 4 (M = Cr, Mo or W) are reviewed in this article.

75 citations


Journal ArticleDOI
TL;DR: A series of 20 complexes of general formula R3SnL (R = CH3, n-C3H7, N-C4H9, C6H5, c-C6H11 ; L = anion of thiophene 2-, thiophenes 2-acetic, furoic 2- and pyrrole 2-carboxylic acids) has been prepared as mentioned in this paper.

62 citations


Journal ArticleDOI
TL;DR: The biochemistry of zinc is now beginning to be understood as discussed by the authors, and a deep knowledge of the chemistry of the element is known to the world, and the potential of zinc in catalysts has been found.

61 citations


Journal ArticleDOI
TL;DR: In this article, the synthesis, characterization, X-ray structure and magnetism of a number of dinuclear compounds, with general formula M2(μ-OH2)(μ-O2CR)2(O2CCl3)2 (tmen)2 are described.

Journal ArticleDOI
TL;DR: In this article, the first and second-lowest energy CT bands of polyoxoanions are qualitatively discussed from the CT interactions among some octahedral units in the UV bands.

Journal ArticleDOI
TL;DR: In this article, two heterocyclic thiosemicarbazones were synthesized and characterized by magnetic-moment measurement, and ESR and IR spectroscopy.

Journal ArticleDOI
TL;DR: In this article, the formation of borate complexes of several mono-, di- and trisaccharides in aqueous solution [t = 25°C, I = 0.1 M (KCl)] was studied by the potentiometric method.


Journal ArticleDOI
TL;DR: Two new quadridentate Schiff base ligands formed from 2,5-hexanedione and S-alkyldithiocarbazic acids and their nickel, zinc, and cadmium(II) complexes having the general formula [M(SNNS) 2− is the dinegatively charged ligands) have been synthesized and characterized by elemental analysis and magnetic and spectroscopic methods.

Journal ArticleDOI
TL;DR: In this article, the authors present a historical perspective to theoretical calculations of metal-metal multiple bonds and explain why calculations on these systems are so difficult and to predict the direction of future research in this area.

Journal ArticleDOI
TL;DR: In this article, the strength of multiple metal-metal bonds in the metal dimers M 2 (M = Cr, Mo or W), M 2 Cl 4 (PH 3 ) 4 M = V, Cr, Mn, Nb, Mo, Tc, Ta, W or Re) has been studied by a non-local density functional theory.

Journal ArticleDOI
TL;DR: In this article, the reaction of (1,10-diamino-4,7-diazadecane)copper(II) in basic methanol with formaldehyde and the carbon acid nitroethane leads to the facile and high-yielding synthesis of the (10-methyl-10-nitro-1,4,8,12,12-tetraazacyclopentadecANE) copper (II) cation.

Journal ArticleDOI
TL;DR: A series of early transition metal organometallic derivatives containing the ancillary ligand 2,6-diphenylphenoxide (OAr-2,6Ph 2 ) have been synthesized as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this paper, the conductance magnetic moment, spectral data, thermal and elemental analyses were used to characterize macrocyclic complexes of [Pr(L)(H2O)2]Cl3, [PR(mac1)]Cl3 and [Pr[Mac2]-Cl3 with semicarazide, thiosemicarbazide and carbohydrazide.

Journal ArticleDOI
TL;DR: In this article, the vibrational, 1 H and 13 C NMR spectra of the new tropolonato (trop) complexes have been measured and the X-ray crystal structure of MoO 2 trop 2 has been determined.

Journal ArticleDOI
TL;DR: X-ray crystallographic studies on the lithium diphenylphosphide adducts (Me2NCH2CH2NMe2 · LiPPh2) are reported in this paper.

Journal ArticleDOI
TL;DR: In this paper, the atomic V/Mo ratios of NaVO 3 Na 2 MoO 4 solutions acidified with HCl were compared with those of V-W solutions containing mixed metal complexes of known composition.

Journal ArticleDOI
TL;DR: In this paper, the preferred palladation position is discussed on the basis of electronic and steric effects, and the regioselectivity of the cyclometallation is characterized by means of IR and 1 H NMR spectroscopy.

Journal ArticleDOI
TL;DR: By reaction of MoCl3(THF)3 with NaSH in tetrahydrofuran, followed by addition of Me2PCH2CH2PMe2(dmpe), then chromatography on silica-gel, and finally addition of NH4PF6, the compound [Mo3S4Cl 3(DMpe)3]PF6·CH3OH was prepared in moderate yield as discussed by the authors.


Journal ArticleDOI
TL;DR: In this article, the reaction of [Bzo 2 Me 4 [14]hexaenato(2−)N 4 ]Ni(II) with glutaryl chloride leads to new γ,γ′-disubstituted derivatives having γ and δ-unsaturated-δ-lactonic rings as substituents.

Journal ArticleDOI
TL;DR: In this article, Schrock et al. found evidence for equilibria involving alkyne adducts and alkylidyne species for certain combinations of R and R′.

Journal ArticleDOI
TL;DR: In this paper, a series of amino acid Schiff base Ni(II) complexes of 2-hydroxy- 1 -naphthaldehyde with glycine, l-alanine and l-aspartic acid was presented.