A. Intermolecular hydrogen bonds increase the melting and boiling points of molecules B. Hydrogen bonds between different molecules increase mutual solubility C. Reduce the density of water D. The above three items 相关知识点: 试题来源: 解析 D 反馈...
They also contribute to the unique and complex properties of water and account for the fidelity of base pairing in nucleic acids. This article breaks down what hydrogen bonds are, how they form, their basic nomenclature, and their biological significance. Trust Your Quantification with the DeNovix...
The protein and MXene Ti3C2Tx were bonded by hydrogen bonds due to their abundant hydrogen bond donors and acceptors. The electrical characteristics of the composite biomaterial could be modified without changing the quantity of each component by varying the number of repeating amino acid sequence ...
The analysis of these bands and their temperature dependence are reported in the present paper. 展开 关键词: Experimental/ hydrogen bonds infrared spectra of inorganic solids polymer films/ H bonding temperature dependence vinyl chloride-vinyl acetate-vinyl alcohol terpolymer IR absorption/ A7830L ...
The nature of the hydrogen bond in alcohol dimers and polymers Evidence is presented that the dimers of alcohols and phenols have an open chain rather than a cyclic structure. It is also shown that the free OH groups of these dimers are able to form stronger hydrogen bonds than the original...
Also, nonclassical interactions in nucleic acids such as interstrand bifurcated hydrogen bonds, interstrand close amino group contacts, C—H … O interbase contacts, sugar–base stacking, intrinsically nonplanar base pairs, out-of-plane hydrogen bonds, and amino–acceptor interactions are commented on....
However, X-ray analysis of crystalline diketo-piperazine, a substance related to the proteins, shows that the molecules are linked together by hydrogen bonds between their respective oxygen atoms and =NH groups, to form flat continuous chains throughout the structure. ···0 CH"2 - . /H·...
Its unique ability to attract an exceptionally large number of hydrogen bonds induces the formation of a dense "hydrogen bond network" that has the potential to modify the properties of the surrounding molecules and their reactivities. The crucial role that water molecules play is described in this...
(30–120kcalmol−1), hydrogen bonds are much less constrained in their geometry and physical properties, and they vary in strength by a factor of at least 20-fold (2–40kcalmol−1). Very few strong hydrogen bonds had been documented before the mid-20th century, principally the very ...
These series provide an opportunity to evaluate the relative strength of competing C-H***N hydrogen and C-I***N halogen bonds and their relative sensitivity to charge. 展开 DOI: 10.1021/cg3007519 被引量: 30 年份: 2012 收藏 引用 批量引用 报错 分享 ...