Table 4.

Selected metrical parameters for [Cu^II(KH)O]⁺, [Cu^II(KH)N]⁺, [Cu^II(H–KH)N]⁺, and [Cu^II(GKH)]⁺.

	[CuII(KH)O]+	[CuII(KH)N]+	[CuII(H-KH)N]+	[CuII(GKH)]+
Cu-NIm	1.948 Å	1.913 Å	1.907 Å	1.978 Å
Cu-Namide	1.985 Å	1.949 Å	1.951 Å	1.946 Å
Cu-O/Cu-N	1.929 Å	1.881 Å	1.879 Å	1.928 Å
Cu-S/Cu-O	2.344 Å	3.592 Å	3.586 Å	2.078 Å
S/O-Cu-Namide	159.4°	153.9°	155.4°	170.7°
NIm-Cu-O/N	162.6°	172.6°	171.5°	168.0°
NIm-Cu-Namide	98.7°	97.1°	96.8°	92.6°
Namide-Cu-N/O	98.3°	84.7°	84.8°	84.4°
N/O-Cu-S/O	72.4°	104.2°	102.7°	99.1°
S/O-Cu-NIm	92.5°	77.3°	79.3°å	85.6°