نتایج جستجو برای: π stacking
تعداد نتایج: 44075 فیلتر نتایج به سال:
The polymeric compound, {(C10H9N2)[Mn(C7H3NO4)2].(C10H8N2).6H2O}n, was prepared by the reaction of manganese (II) nitrate with pyridine-2,3-dicarboxylic acid, (py-2,3-dcH2) and 4,4'-bipyridine (4,4'-bipy) in a 1:2:4 molar ratio. The crystal system of the complex is monoclinic with space group P21/n and four molecules per unit cell. The unit cell parameters are: a = 22.2099(15) Å, b = 6.6599(4)...
A new class of platinum(ii) terpyridine complexes with a phosphole-derived bridging alkynyl ligand have been prepared. The X-ray crystal structure of complex 2 has been determined, and reveals a polymeric zig-zag chain structure with the existence of π-π stacking interactions. The photophysical properties have also been studied, with 3MLCT/3LLCT phosphorescence exhibited in degassed CH2Cl2; the...
In the crystal structure of the title salt, C10H16N3O(+)·C7H5O2 (-), the cations and anions are linked to each other via N-H⋯O hydrogen bonds, forming infinite chains running along [010]. The crystal structure also features C-H⋯O and π-π stacking inter-actions, which assemble the chains into supra-molecular layers parallel to (100). The π-π stacking inter-actions are observed between the pyridi...
The crystal structure of the title compound, C8H10N2O3S, displays predominant C-H⋯O hydrogen-bonding and π-π stacking inter-actions. The hydrogen bonds are between the O atoms of the sulfonyl group and H atoms on methyl groups. The π-π stacking inter-actions occur between adjacent aromatic rings, with a centroid-centroid distance of 3.868 (11) Å. These inter-actions lead to the formation of cha...
In the mol-ecules of the title compounds, methyl 5-bromo-2-[(2-chloro-quinolin-3-yl)meth-oxy]benzoate, C18H13BrClNO3, (I), methyl 5-bromo-2-[(2-chloro-6-methyl-quinolin-3-yl)meth-oxy]benzoate, C19H15BrClNO3, (II), methyl 2-[(2-chloro-6-methyl-quinolin-3-yl)meth-oxy]benzoate, C19H16ClNO3, (III), which crystallizes with Z' = 4 in space group P212121, and 2-chloro-3-[(naphthalen-1-yl-oxy)meth-yl]q...
In the title compound, C(25)H(15)ClN(2)O(2), the pyridine ring is inclined at angles of 6.89 (7), 4.24 (9) and 66.98 (4)° with respect to the naphthalene, chloro-phenyl and nitro-phenyl rings, respectively. The two substituent aromatic rings make a dihedral angle of 71.1 (1)° with one another. C-H⋯π and π-π stacking are present in the crystal structure; the π-π stacking [centroid-centroid dista...
The title compound (C10H9N2)[Cr(C6H7NO6)2](C10H8N2)∙2H2O or (4,4´-bipyH)[Cr(ntaH)2](4,4´-bipy)∙2H2O (ntaH3 is nitrilotriacetic acid) was synthesized by reaction of Cr(NO3)3∙9H2O with 4,4´-bipyridine, and nitrilotriacetic acid with 4:2:1 molar ratio in aqueous solution. The crystal structure of this complex was identified using X-ray crystallography. The unit cell parameters are as follows: a...
BACKGROUND Among the 20 natural amino acids histidine is the most active and versatile member that plays the multiple roles in protein interactions, often the key residue in enzyme catalytic reactions. A theoretical and comprehensive study on the structural features and interaction properties of histidine is certainly helpful. RESULTS Four interaction types of histidine are quantitatively cal...
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