The meaning of HYDROGEN BOND is an electrostatic attraction between a hydrogen atom in one polar molecule (as of water) and a small electronegative atom (as of oxygen, nitrogen, or fluorine) in usually another molecule of the same or a different polar su
The meaning of HYDROGEN BOND is an electrostatic attraction between a hydrogen atom in one polar molecule (as of water) and a small electronegative atom (as of oxygen, nitrogen, or fluorine) in usually another molecule of the same or a different polar su
O. P. ANDERSONJohn Wiley & Sons, LtdChemischer InformationsdienstS.H. Strauss, K.D. Abney, O.P. Anderson, An unusual hydrogen bond between oxygen atoms: preparation and characterization of [N(n-Bu)4þ][H(OTeF5)2A], Inorg. Chem. 25 (1986) 2806e2812....
nitrogen, and sulfur) via a covalent bond develops a partial positive charge and gets attracted to another strong electronegative atom (e.g., oxygen, fluorine, nitrogen, and sulfur), which has developed a partial negative charge due to attraction between the electron cloud and its neighbor atom...
Calculations on model complexes between bromobenzenes or bromopyrimidines and acetone indicate that a Br⋯OC angle of 120 degrees or slightly higher is optimum,219 corresponding to approach of the halogen along an oxygen lone-pair direction. However, there is evidence from the PDB that halogen ...
Minima structures have been found for all HB and XB systems. Proton transfer is generally observed in complexes with three or four oxygen atoms, namely, HXO4:NH3, HClO3:Cl, HBrO3:Cl, and HXO4:Cl. All XB complexes fall into the category of halogen-shared complexes, except for HClO4:NH3 ...
It was seen that the halogen bond between iodine and carbonyl oxygen appeared to have an important catalytic effect on such reactions,and the first iodine... WANG,Yan-hua,LI,... - 《高等学校化学研究(英文版)》 被引量: 6发表: 2008年 Topological studies of electron density on the halogen-...
aThe molecules exert forces upon each other ,which depend upon the distance between them. 分子施加力量在彼此,取决于他们之间的距离。[translate] aas they exist,and then by an intellectual survey of alternative possibilities which are consistent with those principles. 因为他们由与那些原则是一致的供选择...
Oxygen-atom transfer from nitrous oxide (N N O) to nickel alkyls. Syntheses and reactions of nickel(II) alkoxides nickel(II) alkoxy alkyl complexes (bipy)Ni(OR)(R) (3, R Et; 4, R iso-Bu), which in turn undergo CO-insertion followed by reductive elimination ... Phillip T. Matsunaga...
The oxygen release and its out-diffusion culminate in the formation of the oxygen deficient (hence metal (Hf)-rich) region through the dielectric, called the conductive filament (CF). Formation of a conductive filament, which is accompanied by a change of the charge transport mechanism, ...