Thus, D glucose in aqueous solution exists as an equilibrium mixture of 5 compounds. The pyranose form predominates in solution.

aD glucofuranose (0.5%)

aD-glucopyranose (37%)

aldehydo- -glucose (0.003%)

bD-glucofuranose (0.5%)

bD-glucopyranose (62%)

TLS Online TPP Program

#Id: 8268

#Unit 1. Molecules and their Interaction Relevant to Biology

Van der Waals interactions involve instantaneous dipoles and induced dipoles that arise because of fluctuations in the electron charge distributions of adjacent nonbonded atoms.

TLS Online TPP Program

#Id: 8269

#Unit 1. Molecules and their Interaction Relevant to Biology

Nitrogenous Base pairs & aromatic amino acids stack together through pi, pi-electronic interactions. These stacking interactions are best example of VWI.

TLS Online TPP Program

#Id: 8270

#Unit 1. Molecules and their Interaction Relevant to Biology

TLS Online TPP Program

#Id: 8271

#Unit 1. Molecules and their Interaction Relevant to Biology

Misplaced Dispersion forces are responsible for

1. Sickle-Cell Anemia

2. Alzheimer's disease

3. CFTR

4. Huntington disease

TLS Online TPP Program

#Id: 8272

#Unit 1. Molecules and their Interaction Relevant to Biology

A hydrogen bond is an intermolecular force (IMF) that forms a special type of dipole-dipole attraction when a hydrogen atom bonded to a strongly electronegative atom exists in the vicinity of another electronegative atom with a lone pair of electrons.

TLS Online TPP Program

#Id: 8273

#Unit 1. Molecules and their Interaction Relevant to Biology

Hydrogen bonds are generally stronger than ordinary dipole-dipole and dispersion forces, but weaker than true covalent and ionic bonds.