X-ray electronic spectra of palladium(II) and zinc(II) complexes with macrocyclic tetraaza ligands

The crystal and molecular structures of 2-methyl-1-methylamino-anthraquinone (I) and 1-methylphenylamino-anthraquinone (II) were studied by the X-ray single-crystal diffraction and the visible spectra of crystalline specimens and their solutions were recorded. The molecule I is closely planar, whereas in the molecule II the amino group is 58° rotated out of the plane of the anthraquinone skeleton. In both structures the molecules pack in stacks. The comparison of experimental and calculated (on the DFT and AM1 levels) molecular structures, together with the comparison of experimental and INDO/S-calculated electronic spectra, give the evidence that molecular conformations (especially for II) change upon transfer from the solid state to solutions, and the π-delocalisation throughout the whole molecule enhances in the solid state.

Introduction to the Theory of X-Ray and Electronic Spectra of Free Atoms

10.1007/978-1-4899-1534-4 ◽

1996 ◽

Cited By ~ 37

Author(s):

Romas Karazija

Keyword(s):

Electronic Spectra ◽

X Ray ◽

Free Atoms

Intermolecular interactions and electronic properties in phosphino-(oligothiophene) palladium(II) and platinum(II) complexes

Canadian Journal of Chemistry ◽

10.1139/v07-033 ◽

2007 ◽

Vol 85 (5) ◽

pp. 383-391 ◽

Cited By ~ 7

Author(s):

Tracey L Stott ◽

Michael O Wolf ◽

Brian O Patrick

Keyword(s):

Solid State ◽

Metal Complexes ◽

Electronic Properties ◽

Crystal Structures ◽

Structural Properties ◽

Absorption Spectra ◽

Intermolecular Interactions ◽

Electronic Spectra ◽

X Ray ◽

Π Stacking

A series of Pt(II) and Pd(II) complexes containing diphenylphosphino-substituted oligothiophene ligands ranging from 1 to 3 thiophene rings in length have been prepared. Crystal structures of four of these complexes were determined via single X-ray crystal diffraction and the solid-state packing arrangements found to vary with both the metal and the thiophene-containing ligand. In some cases, π-stacking between thiophene rings are found for the oligothiophene ligands. Solution and solid-state absorption spectra of these complexes are reported.Key words: oligothiophenes, metal complexes, structural properties, electronic spectra.

New coordination polymers of glyoxal bis(2-hydroxyanil)

High Performance Polymers ◽

10.1088/0954-0083/7/4/005 ◽

1995 ◽

Vol 7 (4) ◽

pp. 433-441 ◽

Cited By ~ 3

Author(s):

Salah A EI-Shatoury

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Metal Ions ◽

Coordination Polymers ◽

Elemental Analysis ◽

Electronic Spectra ◽

Metal Content ◽

X Ray ◽

Dsc Analyses ◽

Scanning Electron

Coordination polymers of [2,2'-(ethandiylidenedinitrilo) diphenol) have been prepared with the metal ions Cu(II), Ni(1I) and Cr(III). They were characterized by elemental analysis, IR and electronic spectra. The metal content in all polymers was found to be consistent with a 1:1 (metal:ligand) stoichiometry. The thermal behaviour of these coordination polymers has been studied by thermogravimetric and DSC analyses in air up to 500 C. The crystallinity of the formed polymers was determined by x-ray analysis. The morphological structures of these polymers were determined by scanning electron microscopy.

Synthesis and structure of 4-methylpyridine complexes of cobalt(II) and nickel(II) hexafluorophosphate and hexafluoroarsenate

Canadian Journal of Chemistry ◽

10.1139/v78-165 ◽

1978 ◽

Vol 56 (7) ◽

pp. 985-991 ◽

Cited By ~ 9

Author(s):

Raymond M. Morrison ◽

Robert C. Thompson

Keyword(s):

Magnetic Properties ◽

Field Strength ◽

Single Crystal ◽

Infrared Spectra ◽

Electronic Spectra ◽

Preliminary Report ◽

Ligand Field ◽

X Ray Diffraction ◽

X Ray ◽

Square Planar

The complexes M(4mepy)4A2 and M(H2O)2(4mepy)8A2 (where M is Ni or Co and A is PF6 or AsF6) have been prepared and their electronic spectra and magnetic properties studied. A preliminary report is made of single crystal X-ray diffraction studies on Ni(H2O)2(4mepy)8(PF6)2, Co(H2O)2(4mepy)8(PF6)2, and Co(4mepy)4(PF6)2. All of the complexes have structures involving complex cations and non-coordinated anions, consistent with extremely weak ligating abilities for both PF6− and AsF6−. Cations identified and characterized are the squashed tetrahedral [Co(4mepy)4]2+ ion, the square planar [Ni(4mepy)4]2+ ion, and the tetragonal [Co(4mepy)4((4mepy)2H2O)2]2+and [Ni(4mepy)4((4mepy)2H2O)2]2+ ions. The ligand field strength of 4-methylpyridine is found to be indistinguishable from that of pyridine in these complexes. Infrared spectra are reported and infrared criteria for establishing the presence of non-coordinated anions in PF6− and AsF6− complexes are suggested.

Crystal Structure and Spectroscopic Behaviour of a Binuclear Copper(II) Complex of Mefenamic Acid and Dimethylsulfoxide

Zeitschrift für Naturforschung B ◽

10.1515/znb-1998-0816 ◽

1998 ◽

Vol 53 (8) ◽

pp. 871-874 ◽

Cited By ~ 23

Author(s):

G. Facchin ◽

M. H. Torre ◽

E. Kremer ◽

O. E. Piro ◽

E. J. Baran

Keyword(s):

Crystal Structure ◽

Single Crystal ◽

Mefenamic Acid ◽

Electronic Spectra ◽

Anthranilic Acid ◽

Binuclear Copper ◽

Triclinic Space Group ◽

Spectroscopic Behaviour ◽

Space Group ◽

X Ray

Abstract The crystal structure of the binuclear Cu(II) complex [Cu(mef)2DMSO]2 (mef = deprotonated N-2,3-dimethylphenyl-anthranilic acid; DMSO = dimethylsulfoxide) has been determined by single-crystal X-ray diffractometry. It crystallizes in the triclinic space group P1̄ with Z = 1. IR and electronic spectra of the compound are also discussed briefly.

Synthesis, Magnetic Properties, and Electronic Spectra of Bis(β-diketonato)chromium(III) and Nickel(II) Complexes with a Chelated Imino Nitroxide Radical: X-ray Structures of [Cr(acaMe)2(IM2py)]PF6and [Ni(acac)2(IM2py)]

Inorganic Chemistry ◽

10.1021/ic011282m ◽

2002 ◽

Vol 41 (17) ◽

pp. 4363-4370 ◽

Cited By ~ 24

Author(s):

Yasunori Tsukahara ◽

Takayuki Kamatani ◽

Atsushi Iino ◽

Takayoshi Suzuki ◽

Sumio Kaizaki

Keyword(s):

Magnetic Properties ◽

Electronic Spectra ◽

Nitroxide Radical ◽

X Ray ◽

Imino Nitroxide

X-ray ? Electronic spectra of rhenium complexes with nitrogen-containing ligands

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science ◽

10.1007/bf00860061 ◽

1971 ◽

Vol 20 (8) ◽

pp. 1748-1748

Author(s):

V. I. Nefedov ◽

I. A. Zakharova ◽

M. A. Porai-Koshits ◽

M. E. Dyatkina

Keyword(s):

Electronic Spectra ◽

Rhenium Complexes ◽

X Ray

Synthesis, Crystal Structures, Electronic Spectra, and Magnetic Properties of Thiolato-Bridged Trinuclear Cobalt(II) Complexes with N, N, S-Tridentate Thiolate Ligands

Advance Sustainable Science, Engineering and Technology ◽

10.26877/asset.v3i1.8352 ◽

2021 ◽

Vol 3 (1) ◽

pp. 0210102

Author(s):

Masahiro Mikuriya ◽

Atsushi Fujita ◽

Takanori Kotera ◽

Daisuke Yoshioka ◽

Hiroshi Sakiyama ◽

...

Keyword(s):

Magnetic Properties ◽

Single Crystal ◽

Electronic Spectra ◽

Coordination Mode ◽

Linear Arrangement ◽

X Ray ◽

X Ray Crystallography ◽

Thiolate Ligands ◽

Trinuclear Complexes ◽

I 11

New trinuclear CoII complexes, [{Co(apaet)2}2Co]X2 (apaet– = 2-[(3-aminopropyl)amino]ethanethiolato; X = SCN (1), ClO4 (2), NO3 (3), Cl (4), Br (5), I (6)) and [{Co(apampt)2}2Co]X2 (apampt– = 1-[(3-aminopropyl)amino]-2-methylpropane-2-thiolato; X = NO3(7), ClO4 (8), Cl (9), Br (10), I (11)), and mononuclear CoIII complexes, [Co(apaet)2]X (X = ClO4 (12), NO3 (13)), were synthesized. Single-crystal X-ray crystallography of 1 and 7 confirmed that the trinuclear complexes have a linear arrangement of octahedral CoIIS2N4-tetrahedral CoIIS4-octahedral CoIIS2N4 chromophores where two thiolate ligands are coordinated to each terminal Co atom in a mer coordination mode and the two thiolato S atoms are further bound to the central Co atom, which is consistent with the electronic spectra and antiferromagnetic properties