Crystal structure of two covalent nucleoside derivatives of ribonuclease A

Biochemistry ◽  
1990 ◽  
Vol 29 (4) ◽  
pp. 928-937 ◽  
Author(s):  
Joseph Nachman ◽  
Maria Miller ◽  
Gary L. Gilliland ◽  
Robert Carty ◽  
Matthew Pincus ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Ribonuclease A ◽  
Derivatives Of

Monoorganomercury and diorganothallium derivatives of 2-thiouracil and 2-S-methylthiouracil; crystal structure of methylmercury(II)-2-S-methylthiouracilate

1990 ◽  
Vol 384 (1-2) ◽  
pp. 19-32 ◽  
Author(s):  
M.S. García Tasende ◽  
M.I. Suárez Gimeno ◽  
A. Sánchez ◽  
J.S. Casas ◽  
J. Sordo ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Derivatives Of

Triazene derivatives of (1,x-)diazacycloalkanes. Part VI. 3-({5,5-Dimethyl-3-[2-aryl-1-diazenyl]-1-imidazolidinyl}methyl)-4,4-dimethyl-1-[2-aryl-1-diazenyl]imidazolidines — Synthesis, characterization, and X-ray crystal structure

2006 ◽  
Vol 84 (10) ◽  
pp. 1294-1300 ◽  
Author(s):  
Keith Vaughan ◽  
Shasta Lee Moser ◽  
Reid Tingley ◽  
M Brad Peori ◽  
Valerio Bertolasi
Keyword(s):  
Crystal Structure ◽  
Significant Degree ◽  
Ion Trapping ◽  
Published Data ◽  
X Ray ◽  
X Ray Crystallography ◽  
Diazonium Ion ◽  
Derivatives Of ◽  
C Nmr

Reaction of a series of diazonium salts with a mixture of formaldehyde and 1,2-diamino-2-methylpropane affords the 3-({5,5-dimethyl-3-[2-aryl-1-diazenyl]-1-imidazolidinyl}methyl)-4,4-dimethyl-1-[2-aryl-1-diazenyl]imidazolidines (1a–1f) in excellent yield. The products have been characterized by IR and NMR spectroscopic analysis, elemental analysis, and X-ray crystallography. The X-ray crystal structure of the p-methoxycarbonyl derivative (1c) establishes without question the connectivity of these novel molecules, which can be described as linear bicyclic oligomers with two imidazolidinyl groups linked together by a one-carbon spacer. This is indeed a rare molecular building block. The molecular structure is corroborated by 1H and 13C NMR data, which correlates with the previously published data of compounds of types 5 and 6 derived from 1,3-propanediamine. The triazene moieties in the crystal of 1c display significant π conjugation, which gives the N—N bond a significant degree of double-bond character. This in turn causes restricted rotation around the N—N bond, which leads to considerable broadening of signals in both the 1H and 13C NMR spectra. The molecular ion of the p-cyanophenyl derivative (1b) was observed using electrospray mass spectrometry (ES + Na). The mechanism of formation of molecules of type 1 is proposed to involve diazonium ion trapping of the previously unreported bisimidazolidinyl methane (13).Key words: triazene, bistriazene, imidazolidine, synthesis, X-ray crystallography, NMR spectroscopy.

scholarly journals CRYSTAL STRUCTURE OF BIS[1-(DIAMINOMETHYLENE)-THIOURON-1-IUM] SULFATE

2017 ◽  
Vol 60 (1) ◽  
pp. 45
Author(s):  
Yuliya V. Butina ◽  
Elena A. Danilova ◽  
Maxim V. Dmitriev ◽  
Aleksey V. Solomonov
Keyword(s):  
Crystal Structure ◽  
Ir Spectroscopy ◽  
Diffraction Data ◽  
Crystalline State ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tautomeric Forms ◽  
Structural Database ◽  
Derivatives Of

For citation:Butina Yu.V., Danilova E.A., Dmitriev M.V., Solomonov А.V. Crystal structure of bis[1-(diaminomethylene)-thiouron-1-ium] sulfate. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 1. P. 45-49. In this work crystal data of bis[1-(diaminomethylene)-thiouron-1-ium] sulfate is shown. This compound was characterized by IR spectroscopy and elemental analysis. The monocrystal of this compound was obtained and the structure was confirmed by single X-ray analysis. Moreover, the work describes potential application of synthesized compound. Comparative characteristics of thiourea and its known salts are demonstrated. It is known, that derivatives of thiourea have several tautomeric forms, which can be different in crystalline state or in solution. Therefore, changed scheme of the synthesis of 2-imino-4-thiobiuret is proposed. Elemental cell of crystal consists of two 1-(diaminomethylene)thiouron-1-ium cations and one sulfat anion. A full set of X-ray diffraction data was deposited in the Cambridge Structural Database (deposit CCDC 1421710) and it can be gotten from the site www.ccdc.cam.ac.uk/data_request/cif.

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