STRUCTURAL AND SPECTRAL STUDIES OF THE MIXED-LIGAND CATION COMPLEX OF LANTHANUM [Lа(L)2bipy2]BPh4 WITH CARBACYLAMIDOPHOSPHATE (CAPh) TYPE LIGAND AND 2,2’-BIPYRIDINE: DOI: Https: doi.Org 10.17721 1728-2209.2020.1(57).4. Вісник: Хімія 2020, 57 (1), 15-19.