Results 21 to 30 of about 121,011 (315)
mSystems, 2022 Pseudomonas aeruginosa is an opportunistic pathogen prevalent in the environment and in health care settings. Transmission in the health care setting occurs through human-human interactions and/or contact with contaminated surfaces.
Sardar Karash, Timothy L. Yahr
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Pyrimidine-2-carboxamide [PDF]
Acta Crystallographica Section E Structure Reports Online, 2007 In the crystal strucuture of the title compound, C(5)H(5)N(3)O, which was obtained upon recrystallization of 2-cyano-pyrimidine from aqueous sodium hydroxide, the amide group is twisted with respect to the aromatic ring by 24.9 (1)°. π-π stacking is observed between partially overlapped rings at a face-to-face separation of 3.439 (6) Å.
Jing-Jing Nie, Qian Yang, Bing-Yu Zhang
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Acta Crystallographica Section E, 2014 In the title molecule, C23H18F2N2O3S, the pyrimidine ring is in a half-chair conformation and the 3-fluorophenyl group is in the axial position. The thiazole ring (r.m.s.
M. S. Krishnamurthy +2 more
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X-ray photodesorption and proton destruction in protoplanetary disks: pyrimidine [PDF]
Monthly Notices of the Royal Astronomical Society, 08/2013, Volume
433, Issue 4, p.3440-3452, 2013 The organic compounds HCN and C2H2, present in protoplanetary disks, may react to form precursor molecules of the nucleobases, such as the pyrimidine molecule, C4H4N2. Depending on the temperature in a given region of the disk, molecules are in the gas phase or condensed onto grain surfaces.
arxiv +1 more source
Crystal structure of 4,6-dichloro-5-methylpyrimidine
Acta Crystallographica Section E: Crystallographic Communications, 2015 The title compound, C5H4Cl2N2, is essentially planar with an r.m.s. deviation for all non-H atoms of 0.009 Å. The largest deviation from the mean plane is 0.016 (4) Å for an N atom. In the crystal, molecules are linked by pairs of C—H...N hydrogen bonds,
Meriem Medjani +4 more
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Molecules, 2021 Objective: In this study, small molecules possessing tetrahydropyrimidine derivatives have been synthesized having halogenated benzyl derivatives and carboxylate linkage. As previously reported, FDA approved halogenated pyrimidine derivatives prompted us
Uzma Arshad +7 more
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Excited States of Proton-bound DNA/RNA Base Homo-dimers: Pyrimidines [PDF]
Journal of Physical Chemistry B, American Chemical Society, 2014,
119, 6, pp.2219, 2015 We are presenting the electronic photo fragment spectra of the protonated pyrimidine DNA bases homo-dimers. Only the thymine dimer exhibits a well structured vibrational progression, while protonated monomer shows broad vibrational bands. This shows that proton bonding can block some non radiative processes present in the monomer.
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Acta Crystallographica Section E: Crystallographic Communications, 2019 In 1-(2-iodobenzoyl)-4-(pyrimidin-2-yl)piperazine, C15H15IN4O, the central piperazine ring adopts an almost perfect chair conformation with the pyrimidine substituent in an equatorial site.
Ninganayaka Mahesha +4 more
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Molecules, 2020 A series of novel 7-substituted-5-(1H-indol-3-yl)tetrazolo[1,5-a]pyrimidine-6-carbonitrile was synthesized via a one-pot, three-multicomponent reaction of appropriate aldehydes, 1H-tetrazole-5-amine and 3-cyanoacetyl indole in catalytic triethylamine ...
Mohamed A. A. Radwan +2 more
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Dipole oscillator strength distributions, sum rules, mean excitation energies, and isotropic van der Waals coefficients for benzene, pyridazine, pyrimidine, pyrazine, s-triazine, toluene, hexafluorobenzene, and nitrobenzene [PDF]
J. Chem. Phys. 153, 124307 (2020), 2020 Experimental, theoretical, and additive-model photoabsorption cross-sections combined with constraints provided by the Kuhn-Reiche-Thomas sum rule and the high-energy behavior of the dipole-oscillator-strength density are used to construct dipole oscillator strength distributions for benzene, pyridazine (1,2-diazine), pyrimidine (1,3-diazine), pyrazine
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