MACROCYCLIC COPPER(II) CHELATE DERIVATIVES OF 2,9-BIS(METHOXYMETHYL)-2,9-DIMETHYL-4,7-DIOXADECANEDIOIC AND 2,2,9,9-TETRAMETHYL-4,7-DITHIADECANEDIOIC ACIDS. CRYSTAL STRUCTURES OF AQUA, PYRIDINE, AND TRIPHENYLPHOSPHINE ADDUCTS OF (2,9-B