نتایج جستجو برای: penta
تعداد نتایج: 2468 فیلتر نتایج به سال:
The dinuclear title complex, [Ti(2)(C(10)H(15))(2)(C(6)F(5)O)(4)O], features two Ti(IV) atoms bridged by an O atom, which lies on an inversion centre. The Ti(IV) atom is bonded to a η(5)-penta-methyl-cyclo-penta-dienyl ring, two penta-fluoro-phenolate anions and to the bridging O atom. The environment around the Ti(IV) atom can be considered as a distorted tetra-hedron. The cyclo-penta-dienyl r...
By using density functional theory with generalized gradient approximation, we have carried out detailed investigations of two-dimensional BxNy nanomaterials in the Cairo pentagonal tiling geometry fully composed of pentagons (penta-BxNy). Only penta-BN and BN2 planar structures are dynamically stable without imaginary modes in their phonon spectra. Their stabilities have been further evaluated...
Starting from the primary representation of neutrosophic information, namely the degree of truth, degree of indeterminacy and degree of falsity, we define a nuanced representation in a penta valued fuzzy space, described by the index of truth, index of falsity, index of ignorance, index of contradiction and index of hesitation. Also, it was constructed an associated penta valued logic and then ...
In the title compound, [Fe(C(5)H(5))(C(15)H(11)N(2)O)], the cyclo-penta-dienyl rings are essentially eclipsed, and the dihedral angle between the cyclo-penta-dienyl ring planes is 0.632 (10)°. The Fe atom is slightly closer to the substituted cyclo-penta-dienyl ring, with an Fe-centroid distance of 1.6374 (3) Å [1.6494 (3) Å for the unsubstituted ring]. The amide group is essentially coplanar w...
Dislocation interactions with twin boundary (TB) have been well-established in nanotwinned metals. Penta-twins, as an extreme of crystal twinning, are tacitly assumed to be more effective at blocking dislocation motions than conventional single or coplanar nanotwins. However, the mechanism underlying between dislocations and penta-twins remains largely unclear. Here, by combining situ transmiss...
The aim of this study was to evaluate the antibacterial and antifungal properties of polyether impression materials using the agar diffusion test. Three different types of polyether impression materials (P2, Penta Soft and Penta) were tested to determine their ability to inhibit the growth of Enterococcus faecalis, Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans. The areas o...
The polyphenolic 1,2,3,4,6-penta-O-galloyl-beta-D-glucose from several medicinal herbs triggers apoptosis and has, thus, been proposed for treatment of malignancy. The substance is at least partially effective through caspase activation. In analogy to apoptosis of nucleated cells, erythrocytes may enter suicidal death or eryptosis, which is characterized by cell shrinkage and by phosphatidylser...
The crystal structure of the title compound, [Hf(C10H15)2(C4H9)2], reveals two independent mol-ecules in the asymmetric unit. The diffraction experiment was performed with a racemically twinned crystal showing a 0.529 (5):0.471 (5) component ratio. Each Hf(IV) atom is coordinated by two penta-methyl-cyclo-penta-dienyl and two n-butyl ligands in a distorted tetra-hedral geometry, with the cyclo-...
Synthesis and structure elucidation of optically active tri-, tetra-, and penta-azamacrocycles having 4-methoxyphenyl pendants are described. Regioselective ring opening of a nosylaziridine with secondary benzyl amines was repeatedly performed to afford the cyclization precursors. Intramolecular N-alkylation of N-(omega-haloalkyl) nosylamide provided tri-, tetra-, and penta-azamacrocycles. On t...
The mol-ecular structure of the title compound, [Fe(C(5)H(5))(C(13)H(4)F(5))], consists of a ferrocenyl group and a 2,3,4,5,6-penta-fluoro-benzene group linked through an ethyne spacer. The crystal packing is dominated by inter-molecular C-H⋯F hydrogen bonds, C-F⋯π inter-actions between the penta-fluoro-benzene groups [F⋯centroid distances = 3.882 (2) and 3.884 (2) Å] and π-π inter-actions betw...
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