Structural Diversity and Magnetic Properties of the Manganese(II)/Carbazol‐9‐ylacetate/ N , N ′‐Donor Reaction System

Four manganese‐based carbazol‐9‐ylacetato complexes [Mn 2 (cabo) 4 (2,2′‐bpy) 2 ] ( 1 ), [Mn 2 (cabo) 2 (2,2′‐bpy) 4 ](ClO 4 ) 2 ( 2 ), [Mn(cabo) 2 (CH 3 OH) 2 ] n ( 3 ), and [Mn(cabo) 2 (4,4′‐bpy) 2 ] n ( 4 ) (cabo – = carbazol‐9‐ylacetate, 2,2′‐bpy = 2,2′‐bipyridine, 4,4′‐bpy = 4,4′‐bipyridine) have been synthesized and characterized. The crystal structure of 1 consists of a symmetrical dimeric Mn II carboxylato paddle‐wheel unit, whereas dinuclear 2 consists of a dimeric unit with two Mn II ions bridged by two carboxylato ligands. Compounds 3 and 4 present comparable 1D structures with Mn II ions bridged by carboxylato ligands. Magnetic‐property studies show that antiferromagnetic exchange interactions propagate among the Mn II ions in 1 , 2 , and 3 .