نتایج جستجو برای: urea bond
تعداد نتایج: 107315 فیلتر نتایج به سال:
The asymmetric unit of the title compound, C10H17N3S, consists of three symmetry-independent mol-ecules with distinctly different conformations, as indicated for example by the C-N-C-C torsion angles of -155.9 (3), 89.9 (3) and 81.1 (4)° along the bond between thio-urea and allyl units. In the crystal, mol-ecules are connected via N-H⋯N and N-H⋯S hydrogen bonds into chains extending along [110]...
IN THE TITLE COMPOUND [SYSTEMATIC NAME: N-(carbamoyl-carb-a-mo-thio-yl)benzamide], C(9)H(9)N(3)O(2)S, the benzoyl and terminal urea fragments adopt cisoid and transoid conformations, respectively, with respect to the S atom. The benzoyl and thio-biuret groups are almost coplanar, making a dihedral angle of 8.48 (5)°. The mol-ecular structure is stabilized by an intra-molecular N-H⋯O hydrogen bo...
In the title compound, C(10)H(10)N(4)O(5)S·C(9)H(9)N(3)O(5), the amide groups of 3-(3,5-dinitro-benzo-yl)-1,1-dimethyl-thio-urea and N,N-dimethyl-3,5-dinitro-benzamide mol-ecules are oriented at dihedral angles of 39.13 (8) and 55.97 (11)°, respectively, to the attached benzene rings. In the crystal, the two mol-ecules are linked by an N-H⋯O hydrogen bond. Weak C-H⋯O link the mol-ecules into a ...
In the title compound, C(15)H(16)N(2)O(2)S, the N-C(=S) bond lengths are indicative of the presence of amide-type resonance. The dihedral angles between the thio-urea unit and the attached aromatic rings are 59.80 (5) and 73.41 (4)° while the dihedral angle between the rings is 56.83 (4)°. In the crystal, inversion dimers linked by pairs of N-H⋯S hydrogen bonds occur. An N-H⋯π inter-action is o...
The two independent mol-ecules in the asymmetric unit of the title compound, C11H12Cl2N2OS, exhibit different conformations, with the benzene ring and the N2CS thio-urea group forming dihedral angles of 87.40 (18) and 69.42 (15)°. An intra-molecular N-H⋯O hydrogen bond is present in each mol-ecule. Two further N-H⋯O hydrogen bonds link the independent mol-ecules into a dimer. In the crystal, th...
The title compound, C8H10N2S, was prepared by reaction of methyl-amine solution, KOH and phenyl-iso-thio-cyanate in ethanol. It adopts a syn-Me and anti-Ph conformation relative to the C=S double bond. The dihedral angle between the N-C(=S)-N thio-urea and phenyl planes is 67.83 (6)°. In the crystal, the mol-ecules centrosymmetrical dimers by pairs of N(Ph)-H⋯S hydrogen bonds. The dimers are li...
The first laboratory synthesis of hard materials such as diamond proceeded to attack of developing materials with high hardness to compete diamond. Boron rich solids are good candidates owing to their short interatomic bond lengths and strong covalent character. Boron containing hard material was synthesized by modifiedmicrowave method under nitrogen atmosphere by using a fuel (glycine or urea)...
A series of long-tail alkyl ethanolamine analogs containing amide-, urea-, and thiourea moieties was synthesized and the behavior of the corresponding monolayers was assessed on the Langmuir-Pockels trough combined with grazing incidence X-ray diffraction experiments and complemented by computer simulations. All compounds form stable monolayers at the soft air/water interface. The phase behavio...
Urea transporter B (UT-B) is a passive membrane channel that facilitates highly efficient permeation of urea. In red blood cells (RBC), while the major function of UT-B is to transport urea, it is assumed that this protein is able to conduct water. Here, we have revisited this last issue by studying RBCs and ghosts from human variants with defects of aquaporin 1 (AQP1) or UT-B. We found that UT...
Polymorphonuclear leukocytes represent primary components of the host's innate immune defenses against fungal infection, suggesting involvement of fungal leukocyte attractants. We have found in various fungi, but not in bacteria or host cells, unstable lipid-like leukocyte chemoattractants, which also induced adherence and degranulation in human neutrophils. Purification from bakers' yeast and ...
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