Table 2. Statistical Data on SESE = αF + βR Correlations (Equation 3) in Y–R–X Systems, Y = NO₂, X = NO₂, CN, Cl, H, OH, NH₂^a.

		Y = NO2				Y = O–
R	n	α	β	r2	α/β	α	β	r2	α/β
polyene	1	–7.39	–10.63	0.945	0.70	27.97	45.91	0.943	0.61
	2	–7.06	–5.03	0.971	1.40	22.12	37.16	0.954	0.60
	3	–5.11	–3.91	0.978	1.31	18.85	29.98	0.956	0.63
	4	–3.87	–3.36	0.975	1.15	16.28	25.26	0.958	0.64
	5	–3.15	–2.73	0.980	1.15	15.08	21.66	0.954	0.70
polyyne	1	–9.32	–4.89	0.942	1.91	36.79	49.00	0.951	0.75
	2	–6.92	–2.87	0.955	2.41	27.37	34.57	0.925	0.79
	3	–5.08	–2.62	0.959	1.94	21.99	26.59	0.919	0.83
	4	–3.96	–2.37	0.969	1.67	18.55	21.62	0.927	0.86
	5	–2.89	–1.87	0.853	1.55	15.87	17.83	0.911	0.89
acene	1	–4.42	–4.72	0.991	0.94	16.80	31.46	0.957	0.53
	2	–2.80	–3.47	0.996	0.81	12.03	23.24	0.965	0.52
	3	–1.90	–2.31	0.995	0.82	9.41	18.20	0.966	0.52
	4	–1.41	–1.72	0.995	0.82	7.78	14.75	0.966	0.53

^aα/β is the ratio between coefficients for field (α) and resonance (β) parameters.