1,720,989 research outputs found
Crystal structure of chlorotris(2,2,6,6-tetramethyl-3,5-heptanedionato)-zirconium(IV), [ZrCl{(CH3)(3)CCOCHCOC(CH3)(3)}(3)]
No full text
Crystal structure of (cyclohexanonetriphenylphosphonium) trichloro(triphenylphosphine)palladate(II)-benzene (1/1),[(C6H5)3P(CHCH2CO(CH2)3)][(C6H5)3PPdCl3]•C6H6
No full textCrystals of the title compd. are triclinic, space group P1, a 9.225(4), b 13.734(5), c 18.056(6) Å, 74.48(3), 94.40(3),
98.82(3)°; Z = 2; R = 0.084; T = 293 K. At. coordinates are given. A quasi regular square planar configuration is realized
in the anion. The P-C bonds in the anion are significantly longer than the P-C(Ph) bonds in the cation. The C=O bond of
1.24 Å is clearly double
NMR EVIDENCE FOR INTERCONVERSION BETWEEN 2 ENANTIOMERIC FORMS OF MACROCYCLIC SCHIFF-BASE LANTHANIDE(III) COMPLEXES THROUGH REVERSIBLE RING CONTRACTION AND EXPANSION
No full textSYNTHESIS AND CHARACTERIZATION OF URANYL(VI) AND THORIUM(IV) COMPLEXES WITH PHOSPHINE OXIDES - THE CRYSTAL-STRUCTURE OF UO2(NO3)2(NO2-C6H4PH2PO)2
No full text
INTERACTION OF 2,4,6-HEPTANETRIONE WITH 1,5-DIAMINO-3-AZAPENTANE AND SIMILAR POLYAMINES - THE CRYSTAL AND MOLECULAR-STRUCTURE OF A NEW HETEROCYCLIC COMPOUND
No full textLANTHANIDE COMPLEXES WITH MALTOL - THE CRYSTAL-STRUCTURE OF DIAQUATRIS(MALTOLATO)PRASEODYMIUM(III) TRIHYDRATE
No full textThe reaction of lanthanide trichlorides with excess of maltol (HMa, 3-hydroxy-2-methyl-4H-pyran-4-one) in benzene or acetone yields the [Ln(HMa)3Cl3].nH2O (Ln = Pr, Nd or Eu; n = 0,1) adducts, whereas in water species as [Pr(Ma)3(H2O)2] or [Sm(Ma)2(OH)(H2O)2] have been isolated. The compounds have been characterized by IR and proton NMR spectroscopy and by thermogravimetric (TG and DTA) analysis. The crystal structure of diaquatris(maltolato)praseodynium(III) trihydrate is also reported. Crystals are triclinic, P1BAR, with a = 9.608(3), b = 11.318(3), c = 12.537(4) angstrom, alpha = 115.39(3)-degrees, beta = 103.08(8)-degrees, gamma = 94.11(4)-degrees, V = 1177 angstrom3, Z = 2. The structure was refined to R = 0.034 based on 3329 observed reflexions. The compound consists of [Pr(Ma)3(H2O)2] molecules in which the Pr atom is eight-coordinated. Three H2O molecules of crystallization are also present
The crystal and molecular structure of trans-bis(triphenylphosphine)dicarbonyl(1,3-di-p-tolyltriazenido)rhenium(I)
No full texttrans-Bis(triphenylphosphine)dicarbonyl(1,3-di-p-tolyltriazenido)rhenium(I) crystd. in triclinic space group P1, with a
15.62(1), b 14.25(1), c 12.48(1) Å, 66.34(4)°, 108.84(4)°, and 115.48(4)°; d.(calcd.) = 1.46 for Z = 2. The structure
was refined to R = 0.056. At. parameters are given. The coordination about the Re atom is approx. octahedral. The
triazenido ligand is coordinated to the metal atom in a bidentate mode with a N(1)-Re-N(3) angle of 57(1)° and a N(1)-
N(2)-N(3) angle of 105(1)°. The Re-N(1) and Re-N(3) bond lengths are 2.21(1) and 2.18(1) Å and the N(1)-N(2) and
N(2)-N(3) distances are 1.33(1) and 1.31(1) Å, resp. The entire Re-triazenido system is essentially planar, indicative of
delocalization over the whole system
- …
