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. 2023 Jun 2;88(13):7940–7952. doi: 10.1021/acs.joc.2c02936

Table 3. Statistical Data on d_CY = aσ + b Correlations in Y–R–X Systems with a Given Number (n) of Repeatable Units in R for a Series of Substituents X = NO₂, CN, Cl, H, OH, NH₂.

		Y = NO₂d_CY = aσ_p + b				Y = O^–d_CY = aσ_p^– + b
R	n	a·10²	±se·10²	%_shortest	r²	a·10²	±se·10²	%_shortest	r²
polyene	1	2.587	0.835	100	0.706	–1.864	0.125	100	0.982
	2	1.635	0.240	63	0.921	–1.321	0.055	71	0.993
	3	1.230	0.118	48	0.964	–1.009	0.075	54	0.978
	4	0.981	0.069	38	0.981	–0.813	0.072	44	0.970
	5	0.809	0.040	31	0.990	–0.685	0.062	37	0.968
polyyne	1	1.701	0.463	100	0.771	–1.890	0.434	100	0.826
	2	1.209	0.251	71	0.853	–1.311	0.163	69	0.941
	3	0.898	0.158	53	0.889	–1.000	0.080	53	0.975
	4	0.693	0.108	41	0.911	–0.774	0.061	41	0.976
	5	0.548	0.075	32	0.930	–0.625	0.052	33	0.973
acene	1	1.663	0.303	100	0.882	–1.162	0.047	100	0.994
	2	0.961	0.106	58	0.954	–0.810	0.073	70	0.969
	3	0.616	0.034	37	0.988	–0.600	0.055	52	0.967
	4	0.445	0.018	27	0.993	–0.483	0.052	42	0.956