Polar substances such as urea dissolve because their molecules form hydrogen bonds with the surrounding water molecules. 像尿素这样的极性物质溶解,是因为它们的分子与周围的水分子形成氢键。 HYDROPHOBIC MOLECULES 疏水分子 Substances that contain preponderance of nonpolar bonds are usually insoluble in water an...
H2O@C60 is a remarkable molecule that consists of a polar molecule encapsulated into a highly symmetric and nonpolar cage. For H2O@C60, the polarity is no longer associated with its external shape. The encapsulated water molecule can rotate freely around the center inside the cage. In this ...
[49], [50] have proposed a Padé dipolar term that is applied at the segment, rather than molecule level, and has been used by Tumakaka and Sadowski [57] within the perturbed chain SAFT (PC-SAFT) equation to describe mixtures of polar and nonpolar fluids. PC-SAFT has also been ...
Polar organic molecules with longer methylene chains and nonpolar molecules such as dinitrogen and methane were completely excluded. The guest-inclusion properties could be explained by the ion-dipole interaction between the host and the guest, which is proportional to the dipole moment of the guest ...
Packing in the crystal is quite different for the two compounds. Large channels with a polar lining are formed in the crystals of [Phe4,Val6]antamanide, whereas in natural antamanide large channels in the crystal are completely surrounded by the lipophilic side groups of the Pro, Phe, and...
Is the bond formed between carbon and hydrogen ionic, polar covalent, or nonpolar covalent? Explain. please answer the question and explain the reason: In which of the following substances is hydrogen bonding between molecules the weakest? (a) CH3OH (b) NH3 (c) PH3 ...
Which atom is most likely to form three covalent bonds? (a) Si (b) C (c) P (d) S. Are the bonds in the compound NF3 polar covalent, nonpolar covalent, or largely ionic? Explain. Are the bonds in the compound CsF polar covalent, nonpolar ...