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An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
In this approach, amidol, a toxic organic chemical, is used as a staining developer electrochemically detected by using binary SnO<sub>2</sub>@Nd<sub>2</sub>O<sub>3</sub> nanocomposites (NCs) by deposition onto a flat glassy carbon electrode (GCE).
In the paper by Asiri et al. [Acta Cryst. (2012), E68, o1154], the title and the chemical name of one of the reagents used in the synthesis are corrected.[This corrects the article DOI: 10.1107/S1600536812011579.].
The title Schiff base compound, C(23)H(23)N(5)O, was synthesized by the reaction of 4-amino-phenazone and 3,5-dimethyl-1-phenyl-pyrazole-4-carbaxaldehyde. The mol-ecule adopts an E configuration about the central C=N double bond. A weak intra-molecular C-H⋯O hydrogen bond generates an S(6) ring motif. The dihedral angle between the pyrazole rings is 24.72 (10)° and the dihedral angles between the pyrazole rings and the adjacent phenyl rings are 58.67 (10) and 46.58 (11)°. The crystal structure is stabilized by weak C-H⋯π inter-actions involving the pyrazolone and phenyl rings.
The book Recent Progress in Organometallic Chemistry mostly reviews the modem techniques and substantial organometallic and medical applications of inorganic materials. Chapters of this book are invited and contributed from the experts throughout the world from prominent researchers and scientists in the field of inorganic chemistry on organometallics and metallocenes. Each chapter provides technical and methodological details beyond the level found in typical journal articles or reviews and explores the application of organometallics, medicinal, inorganic, and catalysis to a significant problem in medical and catalysis, also providing a prospectus for the future. This book compiles with the expert knowledge of many specialists in the organic-inorganic synthesis and use of inorganic catalyst and metallocenes including chemical catalysis, biological catalysis, photo-electrocatalysis, bioassays, industrial catalysis, large-scale synthesis, micro-nanocatalyst, and so on in the field of fundamental and applied organometallic chemistry. Highlighting and importance are included on real and practical problems, ranging from industrial to medical applications and from single-multicells to animal to human objects. This offers the unique opportunity of exchanging and combining the scientist or researcher in organometallic chemistry in largely chemistry, biological, biomedical, physiological, metallocene, and inorganic chemistry fields.
The six-membered N-heterocyclic ring of the title compound, C(17)H(15)ClN(2)O, is fused with a methyl-substituted cyclo-hexene ring. The approximately planar nitro-gen-bearing ring (r.m.s. deviation 0.019 Å) is aromatic, and the N atom shows a trigonal-planar coordination; its benzene substituent is aligned at 77.1 (1) °. The cyclo-hexene ring adopts a half-chair conformation. In the crystal, inversion-related mol-ecules are linked by pairs of N-H⋯O hydrogen bonds, generating dimers.
A convenient method for the synthesis of borasiloxanes from silanes and pinacolboranes using Cu<sub>3</sub>(BTC)<sub>2</sub> as a heterogeneous catalyst in acetonitrile at 70 °C is reported. This procedure is more convenient than Ru and Pd based homogeneous catalysts because it avoids the use of noble metals, easy handling of starting materials and the catalyst can be reused.
A twist is evident in the title compound, C(21)H(21)N(3)O(2), the dihedral angle between the terminal six-membered rings being 29.46 (10)°; the linked five- and six-membered rings are coplanar [1.30 (11)°]. The carbonyl O atom accepts intra-molecular hydrogen bonds from the adjacent hy-droxy and amine groups. The three-dimensional crystal packing is achieved through C-H⋯π inter-actions.
Our goal in this paper is to find the form of solutions for the following systems of rational difference equations: \[ x_{n+1}=\frac{x_{n-3}y_{n-4}}{y_{n}(\pm 1\pm x_{n-3}y_{n-4})},\quad y_{n+1}=\frac{y_{n-3}x_{n-4}}{x_{n}(\pm 1\pm y_{n-3}x_{n-4})},\quad n=0,1,\ldots, \] where the initial conditions have non-zero real numbers.
