Table 2.

¹³C NMR chemical shifts and IR ν(C ≡ N) values in the solid state for CNMes and its adducts.

Sample	δ13C, ppm	∆δ13C (free—XB), ppm	ν(C ≡ N), cm–1	∆ν(C ≡ N) (XB—free), cm–1	dXB, Å
CNMes	167.17	–	2116	–	–
(CNMes)•IPFB	162.82	4.35	2126	10	3.134
(CNMes)•1,2-FIB	162.95	4.22	2128	12	3.029
(CNMes)2•1,4-FIB	164.15	3.02	2125	9	3.121
(CNMes)2•1,3,5-FIB	164.50/	2.67/	2118	2	3.334/
	161.06	6.11			3.186