Table 1. Selected geometric parameters (Å, °).

N1A—Cu1A	1.991 (6)	N1B—Cu1B	1.999 (6)
Cu1A—N2A	2.044 (5)	Cu1B—N2B	2.050 (5)
Cu1A—N3A	2.012 (6)	Cu1B—N3B	2.004 (6)
Cu1A—N4A	2.017 (5)	Cu1B—N4B	2.031 (5)
Cu1A—O1W	2.621 (5)	Cu1B—O2W	2.557 (5)
Cu1A—O4W	2.599 (5)	Cu1B—O3W	2.564 (5)
N1A—Cu1A—N2A	85.1 (2)	N1B—Cu1B—N2B	84.8 (2)
N3A—Cu1A—N4A	85.2 (2)	N3B—Cu1B—N4B	85.0 (2)
O4W—Cu1A—O1W	177.6 (2)	O2W—Cu1B—O3W	176.3 (2)