Two New Tripodal Ligands with an N4S3 Donor Set. The X-Ray Crystal Structure of 4,4′,4′′- [Nitrilotris(ethyleneimino)]tris(pent-3-ene-2-thione).

1997 ◽  
Vol 50 (4) ◽  
pp. 373 ◽  
Author(s):  
Penelope J. Brothers ◽  
Clifton E. F. Rickard ◽  
Claire M. Strange ◽  
David C. Ware
Keyword(s):  
Crystal Structure ◽  
Donor Ligands ◽  
Tripodal Ligands ◽  
Tripodal Ligand ◽  
X Ray ◽  
New Compounds

Two new compounds with a tripodal ligand architecture and with the potential to act as heptadentate N4S3 donor ligands are reported. H3S3trac (4,4′,4′′-[nitrilotris(ethyleneimino)]tris(pent-3-ene-2-thione)) is prepared by the reaction of acetylacetone with tren (tris(2-aminoethyl)amine), followed by treatment with P2S5. H3trimda (3,3′,3′′-[nitrilotris(ethyleneimino)]tris(2-phenylpropenethial)) is prepared by the reaction of 4-phenyl-1,2-dithiolium perchlorate with tren. A crystal structure of H3S3trac shows it to be monoclinic, P 21/c, a 11·443(7), b 11·7757(14), c 19·285(3) Å, β 106·68(2)°, Z 4, R 0·0454, ωR2 0·1108 for 1618 observed reflections (I > 3σ(I)). 1H and 13C { 1H} n.m.r. data for H3S3trac and H3trimda, and the crystal structure of H3S3trac are consistent with the compounds existing in the enamino thione tautomer.

scholarly journals Synthesis and X-ray Crystal Structures of Novel Spiro 1,3-benzoxazine Dimers

2002 ◽  
Vol 2002 (10) ◽  
pp. 473-474 ◽  
Author(s):  
H.Z. Alkhathlan ◽  
M.A. Al-Saad ◽  
H.M. Al-Hazimi ◽  
K.A. Al-Farhan ◽  
A.A. Mousa
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Mass Spectra ◽  
X Ray ◽  
New Compounds

Novel spiro 1,3-benzoxazine dimers are obtained when hydrazones of 2-hydroxyacetophenone are treated with triphosgene. An X-ray crystal structure, and the NMR and mass spectra of these new compounds, are reported and discussed.

Dioxotungsten(VI) Complexes of ONO Donor Ligands and the X-Ray Crystal Structure of [WO2(o-OC6H4CH=NN=C(O)C6H5)(MeOH)]·MeOH

1995 ◽  
Vol 68 (10) ◽  
pp. 2847-2852 ◽  
Author(s):  
Mannar R. Maurya ◽  
Deena C. Antony ◽  
Sarada Gopinathan ◽  
Vedavati G. Puranik ◽  
Sudam S. Tavale ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Donor Ligands ◽  
X Ray

Reactions of bis(isoproplxanthato)nickel(II) with nitrogen or oxygen donor ligands—III. X-ray crystal structure of the complex with pyrazine

Polyhedron ◽  
1996 ◽  
Vol 15 (18) ◽  
pp. 2975-2981 ◽  
Author(s):  
Zdeněk Trávíček ◽  
Richard Pastorek ◽  
Zdeněk Šindelář ◽  
Jiří Kameníček ◽  
Jaromír Marek
Keyword(s):  
Crystal Structure ◽  
Donor Ligands ◽  
X Ray ◽  
Oxygen Donor

Interaction of the Components in the {Ce, Gd}-{Ti, Zr}-Sb Systems

2019 ◽  
Vol 289 ◽  
pp. 3-11
Author(s):  
Oleksandr Senchuk ◽  
Roman E. Gladyshevskii
Keyword(s):  
Crystal Structure ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Ternary Systems ◽  
The Other ◽  
Powder Diffraction Data ◽  
Isothermal Sections ◽  
X Ray ◽  
Ternary Compounds ◽  
New Compounds

The phase equilibria in the ternary systems {Ce, Gd}–{Ti, Zr}–Sb were investigated by means of X-ray powder diffraction and energy-dispersive X-ray spectroscopy. The isothermal sections of the phase diagrams at 600°C were constructed. The formation of three ternary compounds (Ce2Ti7Sb12, Ce3TiSb5, and Gd2Ti11Sb14) was confirmed in the {Ce, Gd}–Ti–Sb systems and no more ternaries were found. The investigation of the {Ce, Gd}–Zr–Sb systems revealed several new ternary compounds and confirmed the known ones. The crystal structure of the new compound Ce0.08(3)Zr1.92(3)Sb was determined from X-ray powder diffraction data. The other new compounds in the Ce–Zr–Sb system were found to have compositions close to ~CeZrSb4and ~Ce2Zr3Sb5. In the Gd–Zr–Sb system the existence of a large homogeneity range was established for the GdZrSb compound along the isoconcentrate 33.3 at.% Sb: Gd1-xZr1+xSb (x= 00.905(18) at 600°C), and a new compound, ~Gd3Zr3Sb14, was discovered. The crystal structures at the boundary compositions of the Gd1-xZr1+xSb phase were refined from X-ray powder diffraction data.

Structure, Electronic Spectrum and Angular-Overlap Bonding Parameters of Bis[bis(pyrazol-1-yl)(2-thienyl)-methane](nitrato-O,O′)nickel(II) Nitrate

1997 ◽  
Vol 50 (2) ◽  
pp. 145 ◽  
Author(s):  
Timothy Astley ◽  
Michael A. Hitchman ◽  
Brian W. Skelton ◽  
Allan H. White
Keyword(s):  
Crystal Structure ◽  
Electronic Spectrum ◽  
X Ray Diffraction ◽  
Tripodal Ligand ◽  
Nitrate Ion ◽  
Transition Energies ◽  
X Ray ◽  
Bonding Parameters

The crystal structure of the complex [Ni(pz2thCH)2(O(O′)NO′′)] NO3 has been determined by X-ray diffraction, where pz and th represent the pyrazolyl and thienyl groups of a potentially tripodal ligand. The thienyl groups are not bound to the metal, which is coordinated to four pyrazolyl groups and a chelating nitrate ion. The electronic ‘d–d’ transition energies are interpreted in terms of angular-overlap bonding parameters which agree well with those reported for other similar complexes.

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