图1是液态水分子 water molecules in liquid state,可以看到氢键(hydrogen boding)并不稳定,导致两个水分子之间像两个磁性不强的磁铁一样,凑巧了就吸一块,旁边要是跑来一个更有吸引力的第三者之类的,那就拜拜了。图2是冰的晶体结构 crystal structure of ice,由非常稳定的氢键(stable hydrogen bonds)维持着。
Knowledge Check How many water molecules does hydrated calcium sulphate contain ? A5 B10 C7 D2Submit The phenomenon in which water molecules are atttracted to each other in the liquid phase more than to water in the gas phase, is known as View Solution Nitric oxide, though an odd electron...
One odd thing about water is that liquid water takes up less space than ice, because as the molecules move past each other they are able to squash closer together. This is unusual. Most substances take up more space in liquid than solid form. The result of this is that water expands ...
Water is characterized by large molecular electric dipole moments and strong interactions between molecules; however, hydrogen bonds screen the dipole–dipole coupling and suppress the ferroelectric order. The situation changes drastically when water is confined: in this case ordering of the molecular dipo...
liquid superlubricity interfacessuperlubricity mechanismphospholipid moleculesphosphoric acid aqueous solutionThe superlubricity mechanism of phospholipid molecules on biological surfaces and interfaces has been receiving much attention. Since the superlubricity can be achieved with a phosphoric acid aqueous solution,...
water molecules. The lack of significant changes in intensity of aromatic C=C in presence of water droplets can explicitly impeach the recent assertions of potent asphaltene adsorption at the interface owing to the π-electron interactions between the vast PAHs and the water molecules38. The –...
Colorless, odorless, tasteless liquid; refractive index 1.3330; exists in three allotropic forms: solid ice, liquid water, and gaseous steam (or vapor); density of water increases with temperature, becomes maximum 1.0000 g/mL at 3.98°C and then decreases with rise in temperatures; density at ...
That water can exist in two distinct ‘glassy’ forms — low- and high-density amorphous ice — may provide the key to understanding some of the puzzling characteristics of cold and supercooled water, of which the glassy solids are more-viscous counterpa
3 Structure of liquid water 4 Ice Snowflakes 5 "Pure" water 6 More about hydrogen bonding Hydrogen bonding in small molecules Hydrogen bonding in biopolymers What you should be able to do Most students of chemistry quickly learn to relate the structure of a molecule to its general properties....
Such silicon-containing molecules generally have greater pharmaceutical activity, higher selectivity and lower toxicity than their carbon counterparts. The enantiopure organosilicon compound (S)-4-(trimethylsilyl)-3-butyn-2-ol {(S)-TMSBOL} is a crucial intermediate for the synthesis of 5-lipoxygenase ...