Synthesis, structure, and vibrational spectrum of poly-μ-pyrazine(pyrazine)(trifluoromethanesulfonato-O)copper(I)

Orange–brown crystals of composition Cu(pyz)2(CF3SO3) (pyz = pyrazine, 1,4-diazine) were obtained from methanol solutions containing Cu(CF3SO3)2 and pyrazine in approximate 1:2 mole ratio. Single crystal X-ray diffraction and infrared and Raman spectroscopy studies are reported. Crystals of the title compound are triclinic, a = 8.312(2), b = 10.903(3), c = 8.201(2) Å, α = 92.53(2), β = 113.77(2), γ = 91.40(2)°, Z = 2, space group [Formula: see text] The structure was solved by heavy atom methods and was refined by full-matrix least-squares to R = 0.035 and Rw = 0.044 for 2458 reflections with 1 ≥ 3σ(I). The compound contains chains of copper ions linked by bidentate bridging pyrazine ligands. The coordination around each copper is completed by monodentate pyrazine and trifluoromethanesulfonato groups to produce a distorted tetrahedral CuN3O chromophore. Keywords: crystal structure, μ-pyrazine copper(I) triflate polymer, vibrational spectra.

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Pyrazine and 2,5-dimethylpyrazine complexes of copper(I) trifluoromethanesulfonate. The crystal and molecular structure of poly-μ-2,5-dimethylpyrazine-(2,5-dimethylpyrazine)-(trifluoromethanesulfonato-O)copper(I)

Canadian Journal of Chemistry ◽

10.1139/v90-294 ◽

1990 ◽

Vol 68 (10) ◽

pp. 1901-1907 ◽

Cited By ~ 22

Author(s):

Tom Otieno ◽

Steven J. Rettig ◽

Robert C. Thompson ◽

James Trotter

Keyword(s):

Crystal And Molecular Structure ◽

Copper Ions ◽

Heavy Atom ◽

Electronic Spectroscopy ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

Full Matrix ◽

X Ray ◽

Neutral Ligands ◽

Spectroscopy Studies

The complexes CuL2(CF3SO3) where L is pyrazine and 2,5-dimethylpyrazine have been prepared by the reaction of copper(I) triflate with the neutral ligand in methanol. Single crystal X-ray diffraction studies on the 2,5-Me2pyz complex are reported. Crystals of the compound are triclinic, a = 9.424(4), b = 12.103(4), c = 9.113(4) Å, α = 110.97(3), β = 117.20(3), γ = 80.26(3)°, Z = 2, space group [Formula: see text]. The structure was solved by heavy atom methods and was refined by full-matrix least-squares procedures to R = 0.033 and Rw = 0.039 for 3326 reflections with I ≥ 3σ(1). The structure is similar to that of the pyz analogue involving chains of copper ions linked by bridging 2,5-Me2pyz ligands and monodenate triflate and terminal 2,5-Me2pyz ligands completing a distorted tetrahedral CuN3O chromophore. Mono-pyrazine and -2,5-dimethylpyrazine complexes of the type CuL(CF3SO3) were obtained by thermolysis of the corresponding bis-ligand complexes. These compounds are assigned a polymeric structure involving bridging neutral ligands and monodenate triflate groups on the basis of infrared spectroscopy studies. Electronic spectroscopy and differential scanning calorimetry studies are also reported. Keywords: pyrazine and 2,5-dimethylpyrazine complexes, copper(I) triflate, crystal structure.

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Temperature‐Dependent Local Structural Changes of Amorphous Thin Ge 20 Te 80 Film Revealed by In Situ Resistance, X‐Ray Diffraction, and Raman Spectroscopy Studies

physica status solidi (b) ◽

10.1002/pssb.202000451 ◽

2020 ◽

Vol 257 (12) ◽

pp. 2000451

Author(s):

Rathinavelu Sengottaiyan ◽

Anbarasu Manivannan

Keyword(s):

Raman Spectroscopy ◽

Structural Changes ◽

X Ray Diffraction ◽

Temperature Dependent ◽

X Ray ◽

Spectroscopy Studies

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Perchlorate and difluorophosphate coordination derivatives of rhenium carbonyl

Australian Journal of Chemistry ◽

10.1071/ch9802369 ◽

1980 ◽

Vol 33 (11) ◽

pp. 2369 ◽

Cited By ~ 40

Author(s):

E Horn ◽

MR Snow

Keyword(s):

Heavy Atom ◽

Coordination Geometry ◽

X Ray Diffraction ◽

Metal Centre ◽

Triclinic Space Group ◽

Full Matrix ◽

X Ray ◽

Rhenium Carbonyl ◽

Hydrolysis Of ◽

Derivatives Of

The complexes Re(CO)5ClO4, Re(CO)5PO2F2, L2(CO)3Re(OClO3) and L2(CO)3Re(PO2F2), where L2 = 2,2?-bipyridyl (bpy), have been synthesized by bromide abstraction reactions from the respective rhenium carbonyl bromide precursors. The complexes were characterized by infrared and mass spectroscopy. The crystal structure of (bpy)(CO)3Re(PO2F2) has been determined from X-ray diffraction data by the heavy-atom technique. The crystals are triclinic, space group Pī with a 8.620(3), b 15.912(5), c 6.466(3) Ǻ, α 102.08(8), β 83.29(8), γ 95.08(4) and Z 2. The structure has been refined by full-matrix least-squares from 2829 reflections to R = 0.084, Rw = 0.088. The coordination geometry about rhenium is that of a distorted octahedron. Difluorophosphate coordinates to the metal centre by one of its oxygen atoms. Formation of the difluorophosphate by hydrolysis of hexafluorophosphate was shown by 31P n.m.r. spectra.

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ChemInform Abstract: On the Symmetry of Ba3Al2O6- X-Ray Diffraction and Raman Spectroscopy Studies.

ChemInform ◽

10.1002/chin.200914006 ◽

2009 ◽

Vol 40 (14) ◽

Author(s):

B. Lazic ◽

V. Kahlenberg ◽

R. Kaindl ◽

A. Kremenovic

Keyword(s):

Raman Spectroscopy ◽

X Ray Diffraction ◽

X Ray ◽

Spectroscopy Studies

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X-ray diffraction, extended x-ray absorption fine structure and Raman spectroscopy studies of WO3 powders and (1−x)WO3−y⋅xReO2 mixtures

Journal of Applied Physics ◽

10.1063/1.368596 ◽

1998 ◽

Vol 84 (10) ◽

pp. 5515-5524 ◽

Cited By ~ 77

Author(s):

A. Kuzmin ◽

J. Purans ◽

E. Cazzanelli ◽

C. Vinegoni ◽

G. Mariotto

Keyword(s):

Raman Spectroscopy ◽

Fine Structure ◽

X Ray Diffraction ◽

X Ray ◽

Absorption Fine ◽

Spectroscopy Studies ◽

X Ray Absorption

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X-ray diffraction and Raman spectroscopy studies of high-pressure polymorphs ofL- andDL-serine

Acta Crystallographica Section A Foundations of Crystallography ◽

10.1107/s0108767306094906 ◽

2006 ◽

Vol 62 (a1) ◽

pp. s255-s255

Author(s):

E. Boldyreva ◽

T. Drebushchak ◽

H. Sowa ◽

S. Goryainov ◽

V. Chernyshev ◽

...

Keyword(s):

Raman Spectroscopy ◽

High Pressure ◽

X Ray Diffraction ◽

X Ray ◽

Spectroscopy Studies

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Crystal structure of Tetracyclo[5,3,1,12,6,04,9]dodecane (iceane)

Australian Journal of Chemistry ◽

10.1071/ch9771837 ◽

1977 ◽

Vol 30 (8) ◽

pp. 1837 ◽

Cited By ~ 5

Author(s):

DPG Hamon ◽

CL Raston ◽

GF Taylor ◽

JN Varghese ◽

AH White

Keyword(s):

Crystal Structure ◽

Rigid Body ◽

Least Squares ◽

Title Compound ◽

Molecular Geometry ◽

Thermal Motion ◽

X Ray Diffraction ◽

Full Matrix ◽

X Ray ◽

Hexagonal Close Packed

The crystal structure of the title compound, C12H18, has been determined at 295 K by X-ray diffraction and refined by full-matrix least squares to a residual of 0.049 for 216 ?observed? reflections; molecular geometry has been corrected for the effects of thermal motion using a rigid body approximation. Crystals are hexagonal, P63/m, a = 6.582(1), c = 11.843(3) Ǻ, Z = 2, the molecules occupying a hexagonal close- packed array.

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