In the title compound, C30H25N3O5, the central five-membered heterocyclic ring adopts an envelope conformation, with the N atom as the flap. The dihedral angles between this central ring and the pendant indane ring system, the trione and benzene rings are 87.49 (5), 82.95 (10) and 72.42 (10)°, respectively. The dihedral angle between the rings of the biphenyl group is 45.99 (13)°. In the crysta...

The title compound, C(16)H(12)F(3)NO, a derivative of biologically active chalcones, comprises two benzene rings and a central -CH=CH-C(=O)- unit. The dihedral angle between the two rings is 10.9 (1)° and the mol-ecule adopts an E configuration about the central olefinic bond. The crystal structure is stabilized by inter-molecular N-H⋯O and N-H⋯N hydrogen bonds.

In this paper, it is proved that the group generated by Bass units contains a subgroup of finite index in central <mml:mi class="M...

BACKGROUND AND PURPOSE Prospective differentiation between reversible cerebral vasoconstriction syndrome and central nervous system vasculitis can be challenging. We hypothesized that high-resolution vessel wall MRI would demonstrate arterial wall enhancement in central nervous system vasculitis but not in reversible cerebral vasoconstriction syndrome. METHODS We identified all patients with ...

This paper is focused on the commutativity of laws semiprime rings, which satisfy some algebraic identities involving homoderivations ideals. It provides new and notable results that will interest researchers in this field, such as “R contains a nonzero central ideal if R admits homoderivation δ I δ(I)⊆Z where ring with center Z R”. Moreover, research also generalizes previously published liter...

Amine–borane complexes have been extensively studied as hydrogen storage materials. Herein, we report a new amine–borane system featuring reversible dehydrogenation and regeneration at room temperature. In addition to high purity H2, the reaction between ethylenediamine bisborane (EDAB) (ED) leads unique boron–carbon–nitrogen 5-membered rings in product where one boron is tricoordinated by thre...

In this paper, we give a matrix construction method for designing DNA codes that come from group rings. We show with our one can obtain reversible $$G^k$$ -codes of length kn, where $$k, n \in \mathbb {N},$$ over the finite commutative Frobenius ring R. employ to many $$\mathbb {F}_4$$ satisfy Hamming distance, reverse, reverse-complement and fixed GC-content constraints. Moreover, improve lowe...

DFT calculations show that a combination of an electric field and electronic excitation is promising mechanism to force molecular switch based on amino-imino tautomerisation into one its two states. By calculating the effect in direction moving hydrogen shape barrier ground low-lying excited states previously proposed switches consisting 5- 7-membered rings with adjacent amino imino groups, we ...

In the title compound, C17H21N5S2, the dihedral angles between the central pyridine ring and its pendant imidazole rings are 29.40 (9) and 40.77 (9)°; the pendant rings are twisted in an opposite sense with respect to the central ring. In each case, the S atom is approximately anti to the N atom of the pyridine ring. For both substituents, the H atom attached to the central C atom of the isopro...