نتایج جستجو برای: imine compounds

تعداد نتایج: 229044  

Journal: : 2021

Schiff base compounds are called relative to the scientist who first prepared them (Hugo Schiff). They synthesized by condensation reaction of carbonyl group –C=O– aldehyde or ketone compound with a primary amine. This leads formation azomethine imine –C=N– plus water molecule. molecules have gained special importance due their biological activity, such as anti-inflammatory and antibiotic. also...

2017

Relational database management systems manages the tables with predefined indexes. In RDBMS indexes are created on the basis of attribute values. The Imine indexing scheme is used to index item sets in relational databases. The index creation is performed with out any constraints. IMine provides a complete representation of the original database. The Imine indexing scheme reduces the input/outp...

2009
Qing Su Qiao-Lin Wu Ling Ye Ying Mu

The title anilide-imine compound, C(24)H(26)N(2)O, features an intra-molecular N-H⋯N hydrogen bond involving the imine and anilide groups to generate an S(6) ring motif. The mol-ecule displays an E configuration about the imine C=N double bond, with the dihedral angle between the two benzene rings being 86.5°. The packing is stabilized by three different C-H⋯π inter-actions.

Journal: :Angewandte Chemie 2011
Karolina Osowska Ognjen Š Miljanić

Nature and chemists approach organic synthesis in very different ways. Living systems are grand masters of parallel synthesis: starting with incredibly complex precursor mixtures, highly specialized enzymes operate selectively, simultaneously, and orthogonally to create many different products at once. In contrast, laboratory synthesis typically relies on reagents and catalysts with broad scope...

Journal: :Berichte der deutschen chemischen Gesellschaft 1913

Journal: :Materials advances 2021

Novel hybrid material poly(imide-imine) has been prepared, which exhibits self-healing behavior and recyclability enabled by the dynamic imine bonds while retaining tunable excellent mechanical thermal properties of polyimide.

2017
Soroush Sardari Samaneh Feizi Ali Hossein Rezayan Parisa Azerang Seyyed mohammad Shahcheragh Ghazaleh Ghavami Azizollah Habibi

Thiosemicarbazides are potent intermediates for the synthesis of pharmaceutical and bioactive materials and thus, they are used extensively in the field of medicinal chemistry. The imine bond (-N=CH-) in this compounds are useful in organic synthesis, in particular for the preparation of heterocycles and non-natural β-aminoacids. In this paper the synthesis of some new thiosemicarbazide derivat...

Journal: :Química Nova 2022

THEORETICAL AND EXPERIMENTAL STUDY OF STRUCTURE REACTIVITY RELATED TO METABOLISM TOXICITY PARACETAMOL. An experimental and theoretical approach on oxidative metabolism of paracetamol was applied for the pharmaceutical chemistry learning. Classical reactions, functional group identification, structural parameter, chemical reactivity using frontier orbitals Fukui index were used explaining main p...

Journal: :Dalton transactions 2012
Sarim Dastgir Gino G Lavoie

Free imine imidazol-2-imine ligands with two different substitution patterns have been isolated for the first time and they were found to exist as an equilibrium mixture of geometric and mesomeric isomers. The relative ratios of these isomers are dependent on both the nature of the substituents and of the solvent. The synthesis of the titanium(IV) alkyl and arylimido complexes of these ligands ...

2011
Bharathi

This paper presents the IMine index, a general and compact structure which provides tight integration of item set extraction in a relational DBMS. Since no constraint is enforced during the index creation phase, IMine provides a complete representation of the original database. To reduce the I/O cost, data accessed together during the same extraction phase are clustered on the same disk block. ...

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