Table 2. Calculated Vibrational Frequencies (cm^–1) of the Formamide Dimer from the Direct- and Transfer-Learned Dimer Models^a.

mode	B3LYP	FFLUX direct	Δ	FFLUX transfer	Δ
1	63.61	59.79	3.82	55.00	8.61
2	137.39	133.50	3.89	139.00	1.61
3	145.83	142.56	3.27	143.78	2.05
4	171.55	165.56	5.99	170.25	1.30
5	178.90	180.79	1.89	179.01	0.11
6	215.04	210.49	4.55	213.27	1.77
7	492.73	459.88	32.85	444.93	47.80
8	503.43	497.96	5.47	480.46	22.97
9	609.42	610.05	0.63	608.61	0.81
10	631.35	623.58	7.77	628.36	2.99
11	825.54	769.94	55.60	766.37	59.17
12	864.14	821.00	43.14	820.91	43.23
13	1049.23	1029.44	19.79	1021.60	27.63
14	1058.91	1043.27	15.64	1051.36	7.55
15	1096.75	1096.17	0.58	1086.08	10.67
16	1103.66	1097.52	6.14	1092.40	11.26
17	1334.23	1291.09	43.14	1242.18	92.05
18	1347.53	1321.20	26.33	1276.70	70.83
19	1422.00	1399.48	22.52	1394.17	27.83
20	1422.24	1423.31	1.07	1404.44	17.80
21	1644.50	1621.77	22.73	1595.27	49.23
22	1651.65	1642.61	9.04	1629.97	21.68
23	1750.48	1770.02	19.54	1732.29	18.19
24	1780.53	1787.54	7.01	1767.84	12.69
25	2999.16	2971.82	27.34	2906.11	93.05
26	3002.21	2979.35	22.86	2984.54	17.67
27	3293.57	3258.34	35.23	3242.56	51.01
28	3338.99	3396.20	57.21	3360.47	21.48
29	3683.01	3617.59	65.42	3560.78	122.23
30	3683.49	3634.32	49.17	3624.55	58.94

^aAbsolute differences (Δ) from the vibrational frequencies calculated using the B3LYP/6-31+G(d,p) training level of theory are also given.