hydrogen bondacceptorwhereas the hydrogen attached to a more electronegative atom serves as the hydrogen bonddonor. The proton acceptor is the electronegative atom that is not covalently bound to the hydrogen. The proton donor is the atom covalently bound to the hydrogen. The proton donor is a...
which gives it a slight negative charge. Mainly through electrostatic attraction, the donor atom effectively shares its hydrogen with the acceptor atom, forming a bond. Because of its extensive hydrogen bonding,water(H2O) isliquidover a far greater range of temperatures that would be expected for ...
基于氧、氮和碳的氢键供体作为目标识别元素进行了比较,卤素和卤素键供体作为氢键供体的等价物进行了讨论。 “Five hydrogen bond donors, Dr. Worthing, may be regarded as a misfortune; to have ten looks like carelessness.” With apologies to Oscar Wilde. 参考文献:Hydrogen-Bond Donors in Drug Design Pe...
D is a highly electronegative donor atom covalently attached to the H atom. A is an acceptor atom with a full or partial negative charge, lone pair of electrons, or another electronegative feature (such as an adjacent pi bond) directed towards the H atom. Hydrogen bonds are usually represente...
Some of the common and popular, and perhaps the most investigated, DESs are the ones comprising an ammonium salt and an appropriate hydrogen bond (HB) donor in a predetermined mole ratio. The formation of the DES is attributed to the H-bonding interaction(s) present between the salt and ...
网络氢键给体 网络释义 1. 氢键给体 ...形成氢键的 H-A的氢原子必须带有一些酸性, 作为氢键给体(hydrogen-bond donor), 酸性氢原子可以与硷性跟能提供电 … tw.knowledge.yahoo.com|基于7个网页
Hydrogen bondsare intermediate in terms of strength and length when compared tovan der waal's forcesandcovalent bonds. A hydrogen bond is mainly formed between a donor atoms such as an amine, which acts as a ligand, or a lewisbaseand acceptor atom likecarboxylic acid. The larger the number...
Several multiterm linear solvation energy models which incorporate directly or indirectly hydrogen bond donor-acceptor parameters were compared experimentally. These included the Kamlet-Taft alpha(KT) scale, the Abraham alpha(2)H scale, and the acceptor (AN*) parameter of Riddle and Fowkes. An enlar...
Insights into hydrogen bond donor promoted fixation of carbon dioxide with epoxides catalyzed by ionic liquids 来自 掌桥科研 喜欢 0 阅读量: 184 作者:M Liu,K Gao,L Liang,F Wang,L Shi,L Sheng,J Sun 摘要: Catalytic coupling of carbon dioxide with epoxides to obtain cyclic carbonates is an ...
[reaction: see text] To verify if hydrogen-bond donor groups can assist fluoride binding at the boron center of triaryl boranes, o-(dimesitylboryl)trifluoroacetanilide has been synthesized. Reaction of this new borane with [n-Bu(4)N][F] in acetone affords the corresponding fluoroborate comple...