S House n. 3
نویسندگان
چکیده
منابع مشابه
Lagrange ' S Theorem with N " 3 Squares
For every N > I we construct a set A of squares such that JA < (4/log 2)N 1 / 3 log N and every nonnegative integer n < N is a sum of four squares belonging to A . Let A be an increasing sequence of nonnegative integers and let A(x) denote the number of elements of A not exceeding x. If every nonnegative integer up to x is a sum of four elements of A, then A(x)4 > x and so A(x) > x 1/4. In 1770...
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In the title compound, [Pd(C(17)H(14)N(3)S(2))(2)]·2C(3)H(7)NO, the deprotonated Schiff base ligand acts as an N,S-bidentate chelate, forming a five-membered ring with the metal atom. The Pd(II) ion, located on an inversion center, is four-coordinated by two of the Schiff base ligands in a square-planar geometry. In the crystal, the indolic NH groups are bonded to the dimethyl-formamide (DMF) s...
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The whole mol-ecule of the title complex, [Pd(C15H21N2S2)2], is generated by twofold rotational symmetry. The palladium(II) atom exhibits a square-planar coordination geometry, and is located on the crystallographic twofold axis that induces a cis configuration of the N,S chelating ligands. In the crystal, mol-ecules stack along the c-axis direction and there are no significant inter-molecular ...
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The title compound, [Zn(C(15)H(14)N(3)S(2))(2)], contains two chemically equivalent Schiff base anions that are coordinated to the Zn(II) ion as tridentate N,N',S-chelating ligands, creating a distorted octa-hedral environment [the smallest angle being 75.40 (6)° and the widest angle being 162.87 (6)°], with the two S atoms in cis positions. The dihedral angle between the mean planes of the two...
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In the title complex, [Ni(C15H21N2S2)2], the Ni(II) atom exhibits a square-planar coordination geometry and is located on an inversion centre leading to a trans configuration of the N,S-chelating ligands. In the crystal, the complex mol-ecules stack at a distance of 4.6738 (3) Å along the a axis, which exclude any significant inter-actions between the aromatic rings.
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ژورنال
عنوان ژورنال: The Plan Journal
سال: 2017
ISSN: 2531-7644
DOI: 10.15274/tpj.2016.01.02.02