Coordination Chemistry and Organometallics

[reaction: see text] Various ferrocene-based organosilanols have been synthesized in four steps starting from achiral ferrocene carboxylic acid. Applying these novel planar-chiral ferrocenes as catalysts in asymmetric phenyl transfer reactions to substituted benzaldehydes afforded products with high enantiomeric exces…

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A problem has arisen in using chiral shift reagents (CSR) and chiral solvating agents (CSA) to determine meso and racemic forms of diastereoisomers in which the stereogenic centers of the molecules are separated by achiral spacers. It is found that NMR signals of both meso and racemic forms of diastereoisomers may exh…

• SERKAN YEŞİLOT

A problem has arisen in using chiral shift reagents (CSR) and chiral solvating agents (CSA) to determine meso and racemic forms of diastereoisomers in which the stereogenic centers of the molecules are separated by achiral spacers. It is found that NMR signals of both meso and racemic forms of diastereoisomers may exh…

• SERAP BEŞLİ

Low-valent group 2 (E = Be and Mg) stabilized compounds have been long synthetically pursued. Here we discuss the electronic structure of a series of Lewis base-stabilized Be and Mg compounds. Despite the accepted zero(0) oxidation state nature of the group 2 elements of some recent experimentally accomplished species…

• CEM BURAK YILDIZ

Abstract The successful development of planar‐chiral bis‐silanols 3a – d and their application as asymmetric organocatalysts in hetero‐Diels–Alder (HDA) reactions is described. All precursors were easily prepared by addition of commerically available silyl electrophiles to a dilithiated [2.2]paracyclophane derivative…

• SALİH ÖZÇUBUKÇU

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• HACI ALİ DÖNDAŞ

Oligomers of methyllithium and tert -butyllithium (R n Li n, n = 1−4; R = Me, t -Bu) as well as phenyllithium (Ph n Li n, n = 1,4) have been studied by using density functional theory (DFT). Possible conformers of methyllithium and tert -butyllithium oligomers were optimized at the B3LYP/6-31+G* level, and relative en…

• FATMA SEVİN DÜZ

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• OSMAN ÇAKMAK

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• AHMET TUTAR

In this study, the synthesis of twelve 3-(2-thienyl)pyrazoline derivatives are described. The structures of all compounds were confirmed by UV, IR, (1)H-NMR, mass spectral data, and microanalyses. In the pharmacological studies, antidepressant and anticonvulsant activities of these compounds have been screened. The an…

• HİLMİ BURAK KANDİLCİ