 Solvation of charges in the betaine by counterions such as lithium with greater solvation allowing more facile rotation in the betaine intermediate , lowering the amount of reversibility . 
 Solvation of charges in the betaine by counterions such as lithium with greater solvation allowing more facile rotation in the betaine intermediate , lowering the amount of reversibility . 
Solvation of charges in the betaine by counterions such as lithium with greater solvation allowing more facile rotation in da betaine intermediate , lowering the amount of reversibility .