Five new spiro[indoline-3,3′-indolizine]s have been synthesized with high regio- and stereospecificity in one-pot three-component reactions between a substituted indole-2,3-dione, ( S )-pipecolic acid trans -3-benzoylacrylic acid, subsequently characterized using combination of elemental analysis, IR 1 H 13 C NMR spectroscopy, mass spectrometry crystal structure analysis. (1′ SR ,2′ ,3 RS ,8a′ ...

A flexible bipyridinium ligand with Lewis acidic sites has been introduced into two isomorphous metal-organic frameworks to yield luminescent porous materials with subtriangular pore windows, which exhibit sensitive fluorescent response for ammonia molecules and can be proved at the molecular level by Raman spectroscopy.

Safflorite, a naturally occurring cobalt-nickel-iron diarsenide (Co,Ni,Fe)As(2), possesses the marcasite-type structure, with cations (M = Co + Ni + Fe) at site symmetry 2/m and As anions at m. The MAs(6) octa-hedra share two edges, forming chains parallel to c. The chemical formula for safflorite should be expressed as (Co,Ni,Fe)As(2), rather than the end-member format CoAs(2), as its structur...

A simple framework for the analysis of the effects of errors in the method of isomorphous replacement is developed. This framework is used to derive phase probability distributions similar to those given by Blow & Crick [Acta Cryst. present analysis suggests an improved means of calculating the mean-square 'lack-of-closure' residuals and shows that they differ by a factor of two for centric and...

in this paper, a faster method for embedding cryptographic information in the image ispresented by expressing the concept of latent prints (steganography). data is encrypted bytwo methods before embedding to increase reliability. then they are embedded into the imageby a button, a method has been expressed to reduce potential noise impact on the wayinformation is encoded.

Bothropstoxin I (BthTX-I), a non-catalytic and myotoxic Lys49-PLA2 from Bothrops jararacussu venom, has been crystallized alone and complexed with -tocopherol inhibitor. These crystals have been shown to diffract X-rays between 2.17 and 1.83 Å resolution. The BthTX-I/ -tocopherol complex crystals are not isomorphous with those of the native protein. This suggests the inhibitor binding has lead ...

The title complex, [NiCl(2)(C(15)H(24)N(6))(C(3)H(7)NO)], is isomorphous with the Co(II) analogue. Three N-atom donors from the facially coordinating triaza macrocyclic ligand, one O-atom donor from dimethyl-formamide and two Cl(-) anions surround the Ni(II) ion in a distorted octa-hedral coordination geometry. Inter-molecular C-H⋯Cl and C-H⋯N hydrogen-bonding inter-actions link the complex mol...

Lamellar neutron diffraction from oriented multilayers of hydrated dipalmitoyl lecithin was phased by isomorphous H(2)O-D(2)O exchange and swelling techniques. Bound water sites were located in the polar head group region of the bilayer profile. A 6-A resolution structure based on the neutron scattering density profile is proposed for the bilayer. It is consistent with the electron density prof...