Table 2. Comparison of selected structural characteristics (Å, °) of ternary Cu^II complexes with various axial ligands (L = DMSO, DMF, OEt₂, H₂O).

Compound	Cu⋯Cu	C—O (basal)	C—O (axial)	Cu—O—C	O—C—O	Reference
[Cu(II)2(naproxen)4(DMSO)2]	2.629 (1)	1.995 (4) 1.958 (4)	2.155 (5) 2.123 (5)	123.1 (4) 121.7 (4)	125.7 (5) 126.2 (5)	Dendrinou-Samara et al. (1990 ▸)
[Cu(II)2(diclofenac)4(DMF)2]	2.6265 (8)	1.981 (2) 1.953 (2)	2.122 (2)	124.7 (2) 121.2 (2)	125.5 (3)	Kovala-Demertzi et al. (1997 ▸)
[Cu(II)2(indomethacinate)4(DMF)2]	2.629 (2)	1.956 (7) 1.967 (7)	2.154 (6)	122.3 (6) 123.6 (6)	125.1 (9) 125.9 (8)	Guessous et al. (1998 ▸)
[Cu(II)2(niflumate)4(DMSO)2]	2.6272 (5)	1.952 (2) 1.968 (2)	2.152 (2)	117.2 (2) 130.5 (2)	123.8 (2) 124.1 (2)	Greenaway et al. (1999 ▸)
[Cu(II)2(3,5-DIPS)4(DMF)2]	2.6139 (9)	1.950 (2) 1.967 (2)	2.129 (2)	121.9 (2) 125.29 (2)	123.8 (3) 123.9 (3)	Morgant et al. (2000 ▸)
[Cu(II)2(3,5-DIPS)4(OEt)2]	2.613 (1)	1.948 (3) 1.957 (3)	2.230 (3)	119.7 (3) 127.0 (3)	124.0 (4) 124.1 (4)	Morgant et al. (2000 ▸)
[Cu(II)2(aspirinate)4(DMF)2]	2.6154 (4)	1.953 (1) 1.971 (1)	2.154 (1)	119.(1) 125.2 (1)	125.7 (2) 125.8 (2)	Viossat et al. (2003 ▸)
[Cu(II)2(niflumate)4(H2O)2]·4DMA	2.6439 (7)	1.952 (2) 1.970 (2)	2.128 (2)	120.9 (2) 127.2 (2)	123.8 (3) 124.6 (3)	Viossat et al. (2005 ▸)
[Cu(II)2(3,5-DIPS)4(DMSO)2]	2.6170 (7)	1.958 (2) 1.972 (2)	2.1226 (19)	122.04 (19) 125.71 (19)	123.3 (3) 123.3 (3)	This work