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. 2022 Jun 10;7(25):21492–21504. doi: 10.1021/acsomega.2c01021

Table 1. Comparison of the Optimized 4,4′-MDI Unit Cell Parameters Based on Different Force Fields.

parameter a (Å) b (Å) c (Å) α (°) β (°) γ (°) total relative error (%)
experiment29 9.974(2) 8.331(2) 15.199(3) 90.000 92.250(2) 90.000  
COMPASS 9.581 8.162 16.080 90.000 94.680 90.000 14
UNIVERSAL 10.736 8.263 14.385 90.000 84.432 90.000 22
DREDING 10.911 8.383 14.400 90.000 84.166 90.000 24