Synthesis and x-ray structural characterization of binuclear iridium(I) and rhodium(I) hydroxypyridinate complexes. 1. Complete assignment of the proton NMR spectra by two dimensional and NOE techniques. The nature of inside and outside proton chemical shift differences

1988 ◽  
Vol 27 (19) ◽  
pp. 3338-3346 ◽  
Author(s):  
Gary S. Rodman ◽  
Kent R. Mann
Keyword(s):  
Chemical Shift ◽  
Structural Characterization ◽  
Nmr Spectra ◽  
Proton Nmr ◽  
Proton Chemical Shift ◽  
Two Dimensional ◽  
X Ray ◽  
Complete Assignment

Chemical shift correlated two-dimensional nmr spectroscopy and its application to solving the proton nmr spectra of oligoribonucleotides

1980 ◽  
Vol 58 (18) ◽  
pp. 1947-1956 ◽  
Author(s):  
Alex D. Bain ◽  
Russell A. Bell ◽  
Jeremy R. Everett ◽  
Donald W. Hughes
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Shift ◽  
Nmr Spectra ◽  
Pulse Sequence ◽  
Chemical Shifts ◽  
Proton Nmr ◽  
Two Dimensional

An alternative two-dimensional nmr pulse sequence, (90°–t1/2–90°–t1/2–FID),correlates the chemical shifts of coupled nuclei. The application of this technique to the solution of the complicated proton nmr spectra of oligoribonucleotides is discussed.

One- and two-dimensional PbII compounds resulting from reaction of PbBr2 and Pb(SCN)2 with pyrimidine-2-thione

2021 ◽  
Vol 77 (7) ◽  
Author(s):  
Vânia Denise Schwade ◽  
Bárbara Tirloni
Keyword(s):  
Structural Characterization ◽  
Diffuse Reflectance ◽  
Tautomeric Form ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
X Ray ◽  
Ft Ir ◽  
Compound Ii

Pyrimidine-2-thione (HSpym) reacts with lead(II) thiocyanate and lead(II) bromide in N,N-dimethylformamide (DMF) to form poly[(μ-isothiocyanato-κ2 N:S)(μ4-pyrimidine-2-thiolato-κ6 N 1,S:S:S:S,N 3)lead(II)], [Pb(C4H3N2S)(NCS)] n or [Pb(Spym)(NCS)] n , (I), and the polymeric one-dimensional (1D) compound catena-poly[[μ4-bromido-di-μ-bromido-(μ-pyrimidine-2-thiolato-κ3 N 1,S:S)(μ-pyrimidine-2-thione-κ3 N 1,S:S)dilead(II)] N,N-dimethylformamide monosolvate], {[Pb2Br3(C4H3N2S)(C4H4N2S)]·C3H7NO} n or {[Pb2Br3(Spym)(HSpym)]·DMF} n , (IIa), respectively. Poly[μ4-bromido-di-μ3-bromido-(μ-pyrimidine-2-thiolato-κ3 N 1,S:S)(μ-pyrimidine-2-thione-κ3 N 1,S:S)dilead(II)], [Pb2Br3(C4H3N2S)(C4H4N2S)] n or [Pb2Br3(Spym)(HSpym)] n , (IIb), could be obtained as a mixture with (IIa) when using a lesser amount of solvent. In the crystal structures of the pseudohalide/halide PbII stable compounds, coordination of anionic and neutral HSpym has been observed. Both Spym− (in the thiolate tautomeric form) and NCS− ligands were responsible for the two-dimensional (2D) arrangement in (I). The Br− ligands establish the 1D polymeric arrangement in (IIa). Eight-coordinated metal centres have been observed in both compounds, when considering the Pb...S and Pb...Br interactions. Both compounds were characterized by FT–IR and diffuse reflectance spectroscopies, as well as by powder X-ray diffraction. Compound (IIa) and its desolvated version (IIb) represent the first structurally characterized PbII compounds containing neutral HSpym and anionic Spym− ligands. After a prolonged time in solution, (IIa) is converted to another compound due to complete deprotonation of HSpym. The structural characterization of (I) and (II) suggests HSpym as a good candidate for the removal of PbII ions from solutions containing thiocyanate or bromide ions.

The Synthesis and Structural Characterization of a Two-Dimensional Coordination Polymer [Co(H2O)(phen)(μ4-bta)1/2]n (H4bta = Benzenetetracarboxylic Acid)

2001 ◽  
Vol 66 (6) ◽  
pp. 870-876 ◽  
Author(s):  
De-Qing Chu ◽  
Ji-Qing Xu ◽  
Ao-Qing Tang
Keyword(s):  
Coordination Polymer ◽  
Single Crystal ◽  
Structural Characterization ◽  
Two Dimensional ◽  
Polymeric Structure ◽  
X Ray ◽  
X Ray Crystallography

Complex [Co(H2O)(phen)(μ4-bta)1/2]n was hydrothermally synthesized from sodium benzene-1,2,4,5-tetracarboxylate, 1,10-phenanthroline and CoCl2·6H2O, and structurally characterized by single-crystal X-ray crystallography, showing that it possesses a novel two-dimensional polymeric structure.

Structural characterization of (±)-3-aryl-1-azabicyclo[2.2.2]octan-3-ols by two-dimensional NMR spectroscopy and X-Ray crystallography. I

1991 ◽  
Vol 29 (11) ◽  
pp. 1130-1139 ◽  
Author(s):  
M. S. Arias-Pérez ◽  
A. Cosme ◽  
E. Gálvez ◽  
F. Florencio ◽  
I. Fonseca ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Structural Characterization ◽  
Two Dimensional ◽  
X Ray ◽  
X Ray Crystallography

Synthesis and Structural Characterization of a New Two-Dimensional Polymeric Thallium(I) Complex, [Tl2(phthalate)]n

2005 ◽  
Vol 60 (7) ◽  
pp. 741-744 ◽  
Author(s):  
M. R. Fadaei ◽  
A. Morsali ◽  
Ali R. Mahjoub
Keyword(s):  
Coordination Polymer ◽  
Structural Characterization ◽  
Two Dimensional ◽  
X Ray ◽  
X Ray Crystallography

Determination of the structure of the [Tl2(phthalate)] by X-ray crystallography shows that there are six (TlO6) and five (TlO5) coordinate Tl atoms. The complex is a two-dimensional coordination polymer.

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