Structures and reactions of a stable dialkylsilylene and various cyclic and acyclic disilenes, which we have recently synthesized, are discussed in detail. The stable silylene was found to be well protected sterically from dimerization but least perturbed electronically as evidenced by UV–vis and NMR spectroscopy. Persilylated acyclic and cyclic disilenes have shown interesting features in the ...

In the title compound, C(15)H(17)IO(4)S, the O atom and the methyl group of the methyl-sulfinyl substituent lie on opposite sides of the plane of the benzofuran fragment. The crystal structure is stabilized by weak inter-molecular C-H⋯π inter-actions between a methyl H atom of the methyl-sulfinyl group and the benzene ring of the benzofuran system, and by an I⋯O halogen bond of 3.173 (3) Å and ...

Halogen bonding interactions between halogenated ligands and proteins were examined using the crystal structures deposited to date in the PDB. The data was analyzed as a function of halogen bonding to main chain Lewis bases, viz. oxygen of backbone carbonyl and backbone amide nitrogen. This analysis also examined halogen bonding to side-chain Lewis bases (O, N, and S) and to the electron-rich a...

Halogen bonding is a rather new but promising type of interaction for the drug discovery process. It is rather directional and involves an electron donor as binding partner. Employing quantum chemical calculations [1-3], we explore the applicability of halogen bonds in molecular design with respect to halogen-enriched fragment libraries (HEFlibs) [4]. Computational studies on protein-ligand com...

In this paper, the effect of halogen compounds on tetrahedrozoline with nanosized fullerene was investigated. First, the structures of Tetrahydrozoline on a fully vectorized nanoclay were optimized with halogen compounds on carbon 69 (R-X: X = F, Cl, Br; R = C60-Tetrahydrozoline-C69-). Then orbital calculations were performed using NBO technique, and structural parameters and bipolar moments of...

The title compound, C(16)H(13)IO(2)S, was prepared by the oxidation of 2-(4-iodo-phen-yl)-5-methyl-3-methyl-sulfanyl-1-benzofuran with 3-chloro-peroxy-benzoic acid. The 4-iodo-phenyl ring makes a dihedral angle of 37.97 (9)° with the plane of the benzofuran fragment, and the O atom and the methyl group of the methyl-sulfinyl substituent lie on opposite sides of this plane. The mol-ecular packin...

The aim of this study was to evaluate the degree of conversion (DC) of two lingual retainer adhesives, Transbond Lingual Retainer (TLR) and Light Cure Retainer (LCR), cured with a fast halogen light, a plasma arc light and a light-emitting diode (LED) at various curing times. A conventional halogen light served as the control. One hundred adhesive samples (five per group) were cured for 5, 10 o...