L3 - molecular shape, molecular forces, non-covalent interactions

Question 1

smalL units

Answer 1

100 picometres (pm) = 0.1 nanometres (nm) = 1 angstrom (A)

Question 2

linear

Answer 2

2 ligands

Question 3

trigonal planar

Answer 3

3 ligands

Question 4

tetrahedral

Answer 4

4 ligands

Question 5

trigonal bypyramid

Answer 5

5 ligands

Question 6

octahedral

Answer 6

6 ligands

Question 7

hybridisation

Answer 7

mixes orbitals of differing energy

Question 8

hybridisation of linear geometry

Answer 8

SP

Question 9

hybridisation of trigonal planar geometry

Answer 9

sp^2

Question 10

hybridisation of tetrahedral geometry

Answer 10

sp^3

Question 11

hybridisation of trigonal bipyramid

Answer 11

sp^3d

Question 12

hybridisation of octahedral

Answer 12

sp^3d^2

Question 13

peptide bond CN bond distance

Answer 13

the C-N bond in the peptide bond is shorter than would be expected if it were a single bond. partial double bond character shortens the inter-nuclear distance

Question 14

phi and psi dihedral angles

Answer 14

N-C (alpha carbon) and C-C( bonded to oxygen) respectively

Question 15

typical energy of covalent bonds, ionic bonds, dipole-dipole interaction, hydrogen bonds

Answer 15

150-1000
250
2
20
respectively

Question 16

consequences of hydrogen bonding

Answer 16

-ice less dense than water
-stabilise protein structure
-stabilises double helixes and protein secondary and higher structures

Question 17

ion-dipole and ion-induced dipole interactions

Answer 17

slightly negTIVE OXYGEN ARE ATTRACTED TO SODIUM CATIONS
slightly positive hydrogen are attracted to chlorine anions