Electrostatic Potential Energy between Double Bond and Double Bond or Double Bond and Single Bond

Intriguing Electrostatic Potential of CO: Negative Bond-ends and Positive Bond-cylindrical-surface

The strong electronegativity of O dictates that the ground state of singlet CO has positively charged C and negatively charged O, in agreement with ab initio charge analysis, but in disagreement with the dipole direction. Though this unusual phenomenon has been fairly studied, the study of electrostatic potential (EP) for noncovalent interactions of CO is essential for better understanding. Her...

Sterol 24,25-Double Bond Reduction in Manduca sexta

Larvae of Manduca sexta were used to obtain a cell-free sterol 24,25-reductase. From the midgut of fifth instar larvae fed a mixture of sitosterol and campesterol a microsome-bound 24,25-sterol reductase was prepared that transformed desmosterol (K,,,, 3 pM), lanosterol (K,,,, 18 pM), and cycloartenol (K,, 33 pM) to cholesterol, 24,25-dihydrolanosterol, and cycloartanol, respectively. With desm...

A trapped double bond-photoisomerization intermediate in a bacterial photoreceptor

NBS mediated nitriles synthesis through C=C double bond cleavage.

An NBS mediated nitriles synthesis through C=C double bond cleavage has been developed. TMSN3 was employed as the nitrogen source for this Cu(OAc)2 promoted nitrogenation reaction. This transformation has a relatively high regio-selectivity to form aromatic nitriles.

Coordination Copolymerization of Polar Vinyl Monomers H2C[double bond]CHX

Of all polymerization methods, catalytic polymerization offers the broadest scope of microstructure control. Stereoregularity, comonomer incorporation and sequences, molecular weights, and molecular weight distributions can be controlled by the catalyst structure. Polyolefins are produced on a vast scale of nearly 100 million tons annually, predominantly by catalytic polymerization. High-densit...