. Author manuscript; available in PMC: 2009 Sep 30.

Published in final edited form as: Dalton Trans. 2008 Dec 5;(3):424–433. doi: 10.1039/b810895a

Table 3.

Comparison of the DMB ¹³C NMR Chemical Shifts for NOCbl with those of other XCbl⁶¹,⁷⁷,⁷⁸

Carbon	AdoCbl	CH₃Cbl	CNCbl	H₂OCbl⁺	NOCbl	(CN)₂Cbl⁻	α-AdoCbl
B7	113.14	113.12	114.04	114.50	113.43	113.63	113.89
B4	120.98	120.83	119.00	118.00	121.29	121.59	121.38
B8	133.03	133.06	132.49	131.82	134.21	134.15	134.29
B5	136.27	136.28	135.60	136.41	133.99	135.07	135.91
B6	136.40	136.37	137.67	137.52	135.75	135.92	135.09
B9	140.62	140.75	139.25	138.70	142.20	142.96	142.40
B2	144.20	144.40	144.39	144.70	144.53	145.22	145.20
K_Co^a	76.6	467	2.88 × 10⁵	4.90 × 10⁷		0^b	0^b

K_Co is the equilibrium constant for formation of the base-on species from the base-off, DMB unprotonated species (Scheme 1).⁶¹

These Cbls are completely base-off.