Multiple-inversion, the analogue of double-inversion pathway recently revealed for SN2@C, is key mechanism in SN2 at N center undermining stereospecificity.

The title compound, C23H32N2OS, is a thio-urea-based insecticide. The dihedral angle between the phenyl ring and the diisopropyl benzene ring plane is 73.18 (6)°, while that between the plane of the thio-urea group and the diisopropyl benzene ring is 86.00 (5)°. Disorder was modelled for the S atom and the two methyl C atoms of the isopropyl group over two sets of sites with an occupancy ratio ...

In this paper, in 2012 and 2013 two of the Three-River Headwaters Region of soil total-nitrogen, data combined ASD FieldSpec 4 made by America spectroradiometer measured spectral reflectance of soil sample chamber data model MSLR and ANN methods modeling. The spectral data is mainly composed of original spectral reflectance(REF) through nine point weighted moving average obtaining four forms of...

Sz~rnmnr~~ . From a molecular orbital study of model systems we derivc the electronic requiremcnts for the Grob fragmentation. The necessary condition for an allowed fragmentation in an ?I-C,-C,-C,-N system, or the amino cation +C,-C,-C,-N is the level ordering A below S . This in turn is set by maximal through-bond coupling of the empty cation orbital and the nitrogen lone pair. The conformati...

In the title compound, C(20)H(19)FN(6)S, the pyrazole ring has an envelope conformation, with the methine C atom being the flap atom. The dihedral angle between the least-squares plane through the pyrazole and triazole rings is 7.59 (9)°, and the triazole and attached benzene ring form a dihedral angle of 74.79 (9)°. The thio-urea group is coplanar with the pyrazole ring [N-N-C-S torsion angle ...

oculo-auriculovertebral dysplasia (goldenhar) is a congenital syndrome. its phenotype differs from craniofacial anomalies to cardiac, vertebral or central nervous system defects. this syndrome is rare and its etiology is not apparent yet. pericentric inversion of chromosome 9 is one of the most common structural balanced chromosomal aberrations with its incidences 15% to 25%. herein we present ...

abstract   in this study, three groups of honey [natural honey; honey produced by the supplementary feeding of bees with saccharose syrup (ssh) and heat and acid (88 _ċ 2 h; 0.1% hcl) treated saccharose syrup honey (issh)] were produced and physicochemical (water content, ph, free acidity, ash, hmf, diastase activity, sucrose, protein and viscosity), microbiological and sensory properties of th...

Background: Nonpuerperal uterine inversion is a rare medical condition that many gynecologists might not be encountered even with one case during their entire medical practice. It refers to the expulsion of uterine corpus from the dilated cervix resulting in uterus being turned inside out. There are two kinds of uterine inversion, puerperal and non-puerperal, which the second condition is less ...

Active deformation in Alborz range is due to N-S convergence between Arabia and Eurasia. This paper provides geomorphic traces of regional deformation in NW Iran in order to characterize active faulting on major faults. Soltanieh and North Zanjan fault systems are involved in convergence boundary extent between South Caspian Basin and Central Iran. Soltanieh and North Zanjan faults are major re...