Table 1. ¹³C NMR assignments of H₃DFO and [Zr(DFO)]⁺ in methanol-d₄. For labeling scheme, refer to Fig. 3 .

Assignment	DFO	[Zr(DFO)]+
a	40.7	40.6
b, c, d, i, j, k	24.3, 24.87, 24.90, 27.0, 27.3, 28.0 30.0	23.4, 23.77, 23.85, 27.5, 27.9, 28.31, 28.35, 29.00, 29.09.
e	48.4	51.2
f	28.7, 28.9	26.4
g	31.2, 31.4	32.1, 32.5
h	40.3	39.5, 40.4
l	48.6	51.5
m	20.2	17.0
C O	173.5, 174.5, 174.7, 174.88, 174.91	164.0, 165.1, 165.5, 174.1, 174.3