. 2021 Apr 20;6(17):11173–11182. doi: 10.1021/acsomega.0c04649

Table 1. Structural Parameters of Buertai Coal^a.

sample	f_a	f_a^c	f_a′	f_a^N	f_a^H	f_a^p	f_a^s	f_a^B	f_al	f_al*	f_al^H	f_al^O
Buertai coal	84.4	4.00	81.45	32.75	48.51	5.60	11.50	15.65	14.34	2.94	8.66	2.74

f_a: total sp²-hybridized carbons; f_a^c: carbonyl or carboxyl group carbons; f_a′: aromatic carbons; f_a^H: protonated aromatic carbons; f_a^N: nonprotonated aromatic carbons; f_a^P: aromatic carbons bonded to hydroxyl or ether oxygen; f_a^S: alkylated aromatic carbons; f_a^B: aromatic bridgehead carbons; f_al: total sp³ carbons; f_al*: methyl carbons; f_a^H: CH or CH₂; f_al^O: aliphatic carbons bonded to oxygen.

Table 1. Structural Parameters of Buertai Coala.

Table 1. Structural Parameters of Buertai Coal^a.