Molecular Knots and Rotamers

Question 1

knots

Answer 1

double twist in structure

Question 2

Trefoil knot

Answer 2

links two catenes together

Question 3

rotaxane

Answer 3

linear molecule threaded through a macrocycle and capped at the end

Question 4

pseudo-rotaxane

Answer 4

linear molecule threaded through a macrocycle without capping at the end

Question 5

formation of rotaxanes

Answer 5

macrocycle threaded through molecule driven by non-covalent interactions eg H-bonding, molecule capped using bulky groups added covalently