Two independent mol-ecules comprise the asymmetric unit of the title compound, C(13)H(19)N(3)OS, which differ in the conformations of the residues linking the thio-urea and the terminal benzene ring, as manifested in the C(m)-C(m)-C(a)-C(a) torsion angles [78.03 (16) and -93.64 (16)°, respectively; m = methyl-ene and a = aromatic]. The dihedral angles [84.40 (4) and 88.28 (5)°] formed between t...

A simple chromatographic procedure using DEAE-Sephadex has been established to isolate the troponin I-troponin C complex from unbound troponin I (TnI) and troponin C (TnC). A 1:1 complex can be formed between bovine cardiac carboxamidomethylated troponin I and rabbit skeletal troponin C. The formation of the complex is calcium dependent. It is stable to DEAE-chromatography in 6 M urea, 3 mM Ca2...

Structural characterization of a hydrogen sulfate complex with a tren-based urea suggests that the anion is coordinated with six NH···O bonds (d(N···O) = 2.857 (3) to 3.092 (3) Å) and one OH···O bond (d(O···O) = 2.57 (2) Å) from three receptors; however, in solution the anion is bound within the pseudo-cavity of one receptor.

The title compound, C15H13ClN2O2S, exists in the solid state in its thione form with typical thio-urea C-S and C-O bonds lengths as well as shortened C-N bonds. An intra-molecular N-H⋯O hydrogen bond stabilizes the mol-ecular conformation. In the crystal, N-H⋯S hydrogen bonds link the mol-ecules into centrosymmetric dimers.

A new urea-containing metal-organic framework (MOF) was synthesized to act as a heterogeneous catalyst. Ureas are well-known for self-recognition and aggregation behavior, resulting in loss of catalytic competency. The catalyst spatial isolation achievable in a porous MOF environment suggests a potentially general solution. The combination of a symmetrical urea tetracarboxylate strut, 4,4'-bipy...

The title compound, C(12)H(9)ClN(2)OS(2), exists in the thio-amide form with an intra-molecular N-H⋯O hydrogen bond across the thio-urea and the carbonyl group. The dihedral angle between the rings is 10.36 (11)°. In the crystal structure, mol-ecules are linked into chains by weak inter-molecular C-H⋯Cl hydrogen-bonding inter-actions.

In the title compound, C(11)H(15)N(3)OS, the dihedral angle between the aromatic ring and the thio-urea unit is 4.28 (7)° and an intra-molecular N-H⋯N hydrogen bond generates an S(5) ring. In the crystal, mol-ecules are linked into (001) sheets by N-H⋯S hydrogen bonds.