A Computational and Structural Database Study of the Metal-Carbene Bond in Groups IA, IIA, and IIIA Imidazol-2-Ylidene Complexes

Table 3

M-Im distances, bond angles, and coordination numbers (CN) of the group IIIA metal-imidazol-2-ylidenes.

Metal	CN	No. of hits	D (M-Im) (Å)			Im-M-X angle (°)
			Mean	Range	St dev	Mean	St dev
B	2	1 (RUBSOY)	1.484
	3	71	1.582	1.514–1.647	0.024	117.7	5.98
	4	101	1.619	1.515–1.71	0.037	111.2	5.86
	5	12	1.619	1.562–1.641	0.022	108.5	22.51
	6	1 (ZITFOY)	1.558
Al	3	2	2.023	1.987–2.072	0.044	118.7	8.00
	4	63	2.063	1.964–2.163	0.034	107.8	5.73
	5	3	2.095	2.07–2.13	0.025	107.8	28.74
	6	2	2.185	2.17–2.198	0.010	104.9	33.97
Ga	2	2	2.240	2.189–2.288	0.055	111.3	9.70
	4	54	2.059	1.984–2.196	0.052	108.5	6.77
	5	1 (LEKBUA)	1.978