Monovalent metal phenylphosphonates and phenylarsonates: Single crystal X-ray structures of A(HO3PPh)(H2O3PPh) (A = K, Rb, Cs, Tl) and Na(HO3AsPh)(H2O3AsPh) and methylamine intercalation of A(HO3PPh)(H2O3PPh) (A = Li, Na, K, Tl)

Amongst A(HO3PPh)(H2O3PPh) (A = alkali metal, Tl) phenylphosphonates of four structure types, lithium, sodium, potassium and thallium compounds undergo methylamine intercalation.