Wall clock time and date at job start Sat Apr 11 2020 06:09:28 AMSOL-version 7.1 by G. D. Hawkins, D. J. Giesen, G. C. Lynch, C. C. Chambers, I. Rossi, J. W. Storer, J. Li, J. D. Thompson, P. Winget, B. J. Lynch, D. Rinaldi, D. A. Liotard, C. J. Cramer, and D. G. Truhlar Copyright 2004 by Regents of the University of Minnesota. All rights reserved. Notice: recipients of this code are asked to comply with the user agreement in Section 1 of the documentation file. ******************************************************************************* * 1SCF - SCF CALCULATION WITHOUT GEOMETRY OPTIMIZATION * - USE EF ROUTINE FOR MINIMUM SEARCH (DEFAULT) * GEO-OK - OVERRIDE INTERATOMIC DISTANCE CHECK * TLIMIT= - A TIME OF 15. SECONDS REQUESTED * CHARGE - CHARGE ON SYSTEM= -1 * AM1 - THE AM1 HAMILTONIAN TO BE USED * DEV - DEVELOPER OPTIONS ARE ALLOWED * SM5.42R - SM5.42R CALCULATIONS WILL BE PERFORMED * - CHARGE MODEL 2 WILL BE USED (CM2A) * - THE SOLVENT IS USER-SPECIFIED * DIELEC - THE SOLVENT DIELECTRIC CONSTANT IS 2.06 * IOFR - THE SOLVENT INDEX OF REFRACTION IS 1.4345 * ALPHA - THE SOLVENT ALPHA IS 0.00 * BETA - THE SOLVENT BETA IS 0.00 * GAMMA - THE SOLVENT MACROSCOPIC SURFACE TENSION IS * 38.93 CAL MOL^-1 ANGSTROM^-2 * FACARB - THE FRACTION OF AROMATIC CARBONS IS 0.00 * FEHALO - THE FRACTION OF ELECTRONEGATIVE HALOGENS IS 0.00 ******************************************************************************* Atom NO. Chemical Bond length Bond angle Dihedral angle number (k) symbol (angstroms) (degrees) (degrees) (I) NA:I NB:NA:I NC:NB:NA:I NA NB NC 1 1 C 2 2 O 1.42894 * 1 3 3 C 1.42908 * 113.99798 * 2 1 4 4 H 1.09003 * 109.47209 * 25.23606 * 3 2 1 5 5 C 1.52998 * 109.47308 * 145.24048 * 3 2 1 6 6 N 1.46506 * 109.46876 * 299.99734 * 5 3 2 7 7 C 1.34780 * 119.99634 * 180.27718 * 6 5 3 8 8 O 1.21340 * 120.00178 * 359.72739 * 7 6 5 9 9 C 1.49450 * 119.99567 * 179.72326 * 7 6 5 10 10 O 1.21350 * 120.00328 * 6.49883 * 9 7 6 11 11 N 1.34774 * 119.99956 * 186.49297 * 9 7 6 12 12 C 1.46931 * 120.62812 * 7.19491 * 11 9 7 13 13 C 1.53199 * 108.77541 * 126.36851 * 12 11 9 14 14 C 1.53039 * 109.31187 * 54.63273 * 13 12 11 15 15 C 1.53038 * 109.53651 * 298.63332 * 14 13 12 16 16 H 1.08997 * 109.50275 * 301.41314 * 15 14 13 17 17 C 1.50709 * 109.49678 * 181.34783 * 15 14 13 18 18 H 1.08003 * 119.99471 * 0.02562 * 17 15 14 19 19 C 1.37874 * 120.00114 * 180.02562 * 17 15 14 20 20 N 1.31509 * 119.99942 * 0.02562 * 19 17 15 21 21 Si 1.86803 * 119.99859 * 180.02562 * 19 17 15 22 22 H 1.48495 * 109.46992 * 359.97438 * 21 19 17 23 23 H 1.48489 * 109.47114 * 120.00022 * 21 19 17 24 24 H 1.48508 * 109.46848 * 239.99886 * 21 19 17 25 25 C 1.46924 * 120.63223 * 186.91125 * 11 9 7 26 26 C 1.53006 * 109.46775 * 265.23865 * 3 2 1 27 27 C 1.52995 * 109.46763 * 178.03121 * 26 3 2 28 28 C 1.53004 * 109.47201 * 174.63565 * 27 26 3 29 29 C 1.53001 * 109.47342 * 294.63088 * 27 26 3 30 30 H 1.09006 * 109.46793 * 184.98782 * 1 2 3 31 31 H 1.09001 * 109.47478 * 304.98191 * 1 2 3 32 32 H 1.08993 * 109.47619 * 64.98556 * 1 2 3 33 33 H 1.08998 * 109.47286 * 180.02562 * 5 3 2 34 34 H 1.08994 * 109.47460 * 59.99864 * 5 3 2 35 35 H 0.96993 * 120.00159 * 0.02562 * 6 5 3 36 36 H 1.08995 * 109.58769 * 246.15179 * 12 11 9 37 37 H 1.08993 * 109.58626 * 6.43837 * 12 11 9 38 38 H 1.08997 * 109.49636 * 174.58676 * 13 12 11 39 39 H 1.09002 * 109.49383 * 294.68313 * 13 12 11 40 40 H 1.08995 * 109.45853 * 58.65615 * 14 13 12 41 41 H 1.09003 * 109.45689 * 178.61503 * 14 13 12 42 42 H 0.97008 * 119.99716 * 180.02562 * 20 19 17 43 43 H 1.08995 * 109.58748 * 353.42383 * 25 11 9 44 44 H 1.09006 * 109.58613 * 113.84825 * 25 11 9 45 45 H 1.08997 * 109.46756 * 298.03237 * 26 3 2 46 46 H 1.08999 * 109.46584 * 58.03232 * 26 3 2 47 47 H 1.09005 * 109.47570 * 54.63452 * 27 26 3 48 48 H 1.08997 * 109.46661 * 59.99470 * 28 27 26 49 49 H 1.08998 * 109.47501 * 179.97438 * 28 27 26 50 50 H 1.09003 * 109.46655 * 299.99953 * 28 27 26 51 51 H 1.09004 * 109.47412 * 185.06682 * 29 27 26 52 52 H 1.08999 * 109.47361 * 305.07546 * 29 27 26 53 53 H 1.09004 * 109.47031 * 65.07614 * 29 27 26 Note: An asterisk (*) indicates this parameter was or will be optimized. Cartesian coordinates (angstroms) NO. Atom X Y Z 1 6 0.0000 0.0000 0.0000 2 8 1.4289 0.0000 0.0000 3 6 2.0101 1.3056 0.0000 4 1 1.3087 2.0156 0.4382 5 6 3.3002 1.2895 0.8224 6 7 2.9968 0.8901 2.1989 7 6 3.9858 0.8113 3.1112 8 8 5.1281 1.0664 2.7912 9 6 3.6754 0.4098 4.5169 10 8 2.5570 0.0412 4.8098 11 7 4.6378 0.4570 5.4593 12 6 5.9498 1.0470 5.1605 13 6 6.2583 2.1201 6.2095 14 6 6.1482 1.5076 7.6076 15 6 4.7205 1.0057 7.8355 16 1 4.0214 1.8345 7.7243 17 6 4.6045 0.4327 9.2246 18 1 5.4630 0.4273 9.8799 19 6 3.4025 -0.0845 9.6588 20 7 2.3573 -0.0783 8.8606 21 14 3.2586 -0.7941 11.3808 22 1 4.5677 -0.6832 12.0728 23 1 2.2302 -0.0407 12.1422 24 1 2.8635 -2.2231 11.2959 25 6 4.3927 -0.0750 6.8067 26 6 2.3269 1.7227 -1.4376 27 6 2.9037 3.1397 -1.4420 28 6 3.3444 3.5067 -2.8605 29 6 1.8350 4.1270 -0.9687 30 1 -0.3633 -1.0238 0.0894 31 1 -0.3634 0.5892 0.8420 32 1 -0.3634 0.4345 -0.9312 33 1 3.7433 2.2854 0.8228 34 1 4.0016 0.5796 0.3843 35 1 2.0838 0.6858 2.4546 36 1 6.7153 0.2719 5.1947 37 1 5.9303 1.4978 4.1684 38 1 7.2690 2.4984 6.0565 39 1 5.5446 2.9384 6.1135 40 1 6.8446 0.6736 7.6945 41 1 6.3913 2.2628 8.3550 42 1 1.5115 -0.4419 9.1663 43 1 3.3455 -0.3620 6.9014 44 1 5.0287 -0.9435 6.9780 45 1 3.0550 1.0327 -1.8640 46 1 1.4135 1.7003 -2.0320 47 1 3.7623 3.1848 -0.7718 48 1 2.4859 3.4616 -3.5306 49 1 3.7549 4.5164 -2.8638 50 1 4.1058 2.8033 -3.1977 51 1 2.2156 5.1446 -1.0571 52 1 0.9419 4.0183 -1.5841 53 1 1.5861 3.9214 0.0725 RHF calculation, no. of doubly occupied orbitals= 66 REFERENCES FOR PARAMETERS IN GAS-PHASE HAMILTONIAN: H: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) C: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) N: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) O: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) Si: (AM1): M.J.S.DEWAR, C. JIE, ORGANOMETALLICS, 6, 1486-1490 (1987). REFERENCE FOR CHARGE MODEL 2: J. Li, J. Xing, C. J. Cramer, and D. G. Truhlar, J. Chem. Phys. 111 (1999) 885. REFERENCE FOR THE PARAMETERIZATION OF THE SM5.42R SOLVATION MODEL: J. Li, T. Zhu, G. D. Hawkins, P. Winget, D. A. Liotard, C. J. Cramer, and D. G. Truhlar, Theor. Chem. Acc. 103 (1999) 9-63 P. Winget, J. D. Thompson C. J. Cramer,and D. G. Truhlar, J. Phys. Chem. B. submitted. CHARGE=-1 AM1 1SCF TLIMIT=15 GEO-OK SM5.42R & SOLVNT=GENORG IOFR=1.4345 ALPHA=0.00 BETA=0.00 GAMMA=38.93 & DIELEC=2.06 FACARB=0.00 FEHALO=0.00 DEV ZINC001334226170.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Sat Apr 11 2020 06:09:28 Heat of formation + Delta-G solvation = -124.060548 kcal Electronic energy + Delta-G solvation = -30989.454891 eV Core-core repulsion = 26861.112964 eV Total energy + Delta-G solvation = -4128.341928 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.63 seconds Orbital eigenvalues (eV) -40.51126 -39.27946 -38.08143 -36.80593 -36.42369 -34.75472 -33.20831 -31.71770 -30.81952 -29.74820 -27.56358 -27.10133 -26.74766 -25.31433 -24.88916 -22.70304 -22.07089 -21.77084 -20.31840 -19.87728 -18.78878 -17.25312 -17.15220 -16.81097 -16.33433 -15.88206 -15.50575 -15.42480 -15.07265 -14.95809 -14.50487 -14.28694 -14.08347 -14.01225 -13.69136 -13.61283 -13.25689 -12.97787 -12.84028 -12.69932 -12.58183 -12.51763 -12.27194 -12.11943 -11.88813 -11.78790 -11.52310 -11.36894 -11.33980 -10.98552 -10.93464 -10.82493 -10.66138 -10.42726 -10.28378 -10.08586 -9.89887 -9.85001 -9.19917 -9.17517 -9.09098 -8.53415 -8.43201 -7.79300 -6.00414 -4.08932 1.85422 2.73469 3.30040 3.36184 3.38328 3.41766 3.68944 3.98736 4.28211 4.42547 4.46178 4.54888 4.68761 4.74291 4.78030 4.96963 5.05669 5.13488 5.19076 5.26690 5.29729 5.37773 5.39034 5.48541 5.49656 5.56065 5.57041 5.62653 5.65580 5.69140 5.81531 5.88797 5.94711 5.99762 6.13039 6.27444 6.39357 6.57419 6.63711 6.74501 6.85364 6.87530 7.00742 7.06108 7.21250 7.29468 7.61831 7.84995 7.96680 8.01567 8.20015 8.37321 8.62277 8.95467 9.56673 11.04854 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.017091 B = 0.002464 C = 0.002264 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1637.848054 B =11362.646825 C =12364.585385 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.029 3.971 2 O -0.379 6.379 3 C 0.074 3.926 4 H 0.073 0.927 5 C 0.118 3.882 6 N -0.699 5.699 7 C 0.510 3.490 8 O -0.520 6.520 9 C 0.494 3.506 10 O -0.522 6.522 11 N -0.569 5.569 12 C 0.067 3.933 13 C -0.133 4.133 14 C -0.113 4.113 15 C 0.040 3.960 16 H 0.029 0.971 17 C -0.518 4.518 18 H 0.060 0.940 19 C 0.061 3.939 20 N -0.881 5.881 21 Si 0.893 3.107 22 H -0.273 1.273 23 H -0.284 1.284 24 H -0.284 1.284 25 C 0.107 3.893 26 C -0.130 4.130 27 C -0.102 4.102 28 C -0.146 4.146 29 C -0.153 4.153 30 H 0.088 0.912 31 H 0.045 0.955 32 H 0.040 0.960 33 H 0.087 0.913 34 H 0.079 0.921 35 H 0.413 0.587 36 H 0.059 0.941 37 H 0.130 0.870 38 H 0.060 0.940 39 H 0.056 0.944 40 H 0.049 0.951 41 H 0.050 0.950 42 H 0.263 0.737 43 H 0.124 0.876 44 H 0.048 0.952 45 H 0.075 0.925 46 H 0.070 0.930 47 H 0.078 0.922 48 H 0.053 0.947 49 H 0.056 0.944 50 H 0.056 0.944 51 H 0.057 0.943 52 H 0.054 0.946 53 H 0.056 0.944 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -0.960 5.895 -22.828 23.596 Note: The Mulliken population analysis charges presented below were not used in the solvation calculation but are provided for completeness. The chosen solvation model uses CM2 partial charges for calculating solvation energies. Net atomic charges, atomic populations, and dipole contributions using Mulliken population analysis Atom NO. Type Charge No. of electrons 1 C -0.068 4.068 2 O -0.298 6.298 3 C 0.016 3.984 4 H 0.091 0.909 5 C -0.006 4.006 6 N -0.352 5.352 7 C 0.293 3.707 8 O -0.397 6.397 9 C 0.275 3.725 10 O -0.399 6.399 11 N -0.301 5.301 12 C -0.055 4.055 13 C -0.171 4.171 14 C -0.150 4.150 15 C 0.021 3.979 16 H 0.047 0.953 17 C -0.557 4.557 18 H 0.078 0.922 19 C -0.141 4.141 20 N -0.519 5.519 21 Si 0.721 3.279 22 H -0.198 1.198 23 H -0.210 1.210 24 H -0.210 1.210 25 C -0.012 4.012 26 C -0.168 4.168 27 C -0.121 4.121 28 C -0.204 4.204 29 C -0.210 4.210 30 H 0.106 0.894 31 H 0.064 0.936 32 H 0.059 0.941 33 H 0.105 0.895 34 H 0.098 0.902 35 H 0.250 0.750 36 H 0.077 0.923 37 H 0.147 0.853 38 H 0.078 0.922 39 H 0.075 0.925 40 H 0.068 0.932 41 H 0.069 0.931 42 H 0.073 0.927 43 H 0.142 0.858 44 H 0.066 0.934 45 H 0.094 0.906 46 H 0.089 0.911 47 H 0.096 0.904 48 H 0.072 0.928 49 H 0.075 0.925 50 H 0.075 0.925 51 H 0.076 0.924 52 H 0.073 0.927 53 H 0.075 0.925 Dipole moment (debyes) X Y Z Total from point charges -0.820 5.641 -22.891 23.590 hybrid contribution -0.740 -0.326 1.072 1.343 sum -1.560 5.315 -21.819 22.511 Atomic orbital electron populations 1.22860 0.80731 1.03181 1.00001 1.87980 1.19889 1.26928 1.94974 1.22489 0.94792 0.85515 0.95614 0.90905 1.21689 0.96626 1.01654 0.80617 1.45688 1.11945 1.68097 1.09491 1.20732 0.85052 0.77542 0.87375 1.90428 1.20115 1.49084 1.80104 1.19798 0.85786 0.81367 0.85586 1.90770 1.20610 1.47357 1.81128 1.48428 1.12774 1.56038 1.12814 1.22779 0.83890 0.96477 1.02364 1.21952 1.00351 0.98032 0.96762 1.21656 1.00131 0.99258 0.93992 1.18895 0.90983 0.94359 0.93676 0.95260 1.21129 0.96327 1.40261 0.97963 0.92207 1.25067 0.95847 0.95771 0.97448 1.69894 1.01237 1.45299 1.35460 0.86522 0.78060 0.78792 0.84560 1.19774 1.21017 1.20972 1.22393 1.05554 0.96865 0.76422 1.22052 1.02180 0.96653 0.95890 1.21219 0.98851 0.94108 0.97908 1.21823 1.01176 1.01464 0.95888 1.21932 0.98639 0.99158 1.01248 0.89368 0.93605 0.94132 0.89505 0.90236 0.75025 0.92266 0.85296 0.92152 0.92479 0.93175 0.93079 0.92717 0.85770 0.93360 0.90586 0.91131 0.90375 0.92773 0.92520 0.92514 0.92396 0.92665 0.92479 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 12. Note: The number of geometries may not correspond to the number of cycles due to rejected geometry changes. In the following table subtotal= G_P + SS G_CDS. Atom Chem. CM2 G_P Area Sigma k SS G_CDS Subtotal M number symbol chg. (kcal) (Ang**2) cal/(Ang**2) (kcal) (kcal) value 1 C 0.03 0.22 10.87 101.05 1.10 1.32 16 2 O -0.38 -3.88 10.09 -35.23 -0.36 -4.24 16 3 C 0.07 0.64 2.14 -26.73 -0.06 0.58 16 4 H 0.07 0.57 6.12 -51.93 -0.32 0.25 16 5 C 0.12 1.25 5.07 -4.04 -0.02 1.23 16 6 N -0.70 -9.56 5.44 -60.73 -0.33 -9.89 16 7 C 0.51 8.67 7.76 -11.58 -0.09 8.58 16 8 O -0.52 -9.03 13.13 5.51 0.07 -8.96 16 9 C 0.49 10.23 7.74 -11.59 -0.09 10.14 16 10 O -0.52 -12.20 15.92 5.50 0.09 -12.11 16 11 N -0.57 -12.10 2.98 -173.53 -0.52 -12.62 16 12 C 0.07 1.22 6.03 -3.70 -0.02 1.19 16 13 C -0.13 -2.36 6.08 -26.61 -0.16 -2.52 16 14 C -0.11 -2.34 5.11 -26.69 -0.14 -2.47 16 15 C 0.04 1.00 2.24 -91.87 -0.21 0.80 16 16 H 0.03 0.82 8.14 -51.93 -0.42 0.39 16 17 C -0.52 -14.11 8.57 -34.44 -0.29 -14.40 16 18 H 0.06 1.60 7.74 -52.48 -0.41 1.19 16 19 C 0.06 1.69 5.31 -17.82 -0.09 1.60 16 20 N -0.88 -25.53 11.39 55.43 0.63 -24.90 16 21 Si 0.89 21.25 29.54 -169.99 -5.02 16.23 16 22 H -0.27 -6.38 7.11 56.52 0.40 -5.98 16 23 H -0.28 -6.74 7.11 56.52 0.40 -6.34 16 24 H -0.28 -6.73 7.11 56.52 0.40 -6.33 16 25 C 0.11 2.64 5.39 -3.93 -0.02 2.62 16 26 C -0.13 -0.90 4.55 -26.73 -0.12 -1.02 16 27 C -0.10 -0.65 2.74 -90.62 -0.25 -0.90 16 28 C -0.15 -0.84 9.19 37.16 0.34 -0.49 16 29 C -0.15 -0.95 8.83 37.16 0.33 -0.62 16 30 H 0.09 0.63 8.14 -51.93 -0.42 0.21 16 31 H 0.05 0.34 7.98 -51.93 -0.41 -0.08 16 32 H 0.04 0.25 8.14 -51.93 -0.42 -0.17 16 33 H 0.09 0.85 6.36 -51.93 -0.33 0.52 16 34 H 0.08 0.90 8.14 -51.93 -0.42 0.48 16 35 H 0.41 5.59 7.84 -40.82 -0.32 5.27 16 36 H 0.06 1.03 8.14 -51.93 -0.42 0.61 16 37 H 0.13 2.27 4.21 -55.34 -0.23 2.04 16 38 H 0.06 0.90 8.14 -51.93 -0.42 0.48 16 39 H 0.06 1.04 8.14 -51.93 -0.42 0.62 16 40 H 0.05 1.02 8.14 -51.93 -0.42 0.59 16 41 H 0.05 1.03 8.14 -51.93 -0.42 0.61 16 42 H 0.26 7.29 8.31 -40.82 -0.34 6.95 16 43 H 0.12 3.49 5.11 -51.93 -0.27 3.23 16 44 H 0.05 1.18 8.14 -51.93 -0.42 0.76 16 45 H 0.08 0.56 8.14 -51.93 -0.42 0.13 16 46 H 0.07 0.46 8.14 -51.93 -0.42 0.03 16 47 H 0.08 0.54 6.22 -51.93 -0.32 0.22 16 48 H 0.05 0.29 8.14 -51.93 -0.42 -0.13 16 49 H 0.06 0.31 8.14 -51.93 -0.42 -0.11 16 50 H 0.06 0.32 8.14 -51.93 -0.42 -0.10 16 51 H 0.06 0.35 8.14 -51.93 -0.42 -0.08 16 52 H 0.05 0.31 8.14 -51.93 -0.42 -0.11 16 53 H 0.06 0.38 6.78 -51.93 -0.35 0.02 16 LS Contribution 412.50 15.07 6.22 6.22 Total: -1.00 -31.18 412.50 -8.30 -39.48 By element: Atomic # 1 Polarization: 14.45 SS G_CDS: -9.28 Total: 5.17 kcal Atomic # 6 Polarization: 5.43 SS G_CDS: 0.20 Total: 5.63 kcal Atomic # 7 Polarization: -47.20 SS G_CDS: -0.22 Total: -47.41 kcal Atomic # 8 Polarization: -25.12 SS G_CDS: -0.20 Total: -25.31 kcal Atomic # 14 Polarization: 21.25 SS G_CDS: -5.02 Total: 16.23 kcal Total LS contribution 6.22 Total: 6.22 kcal Total: -31.18 -8.30 -39.48 kcal The number of atoms in the molecule is 53 The average number of expansion shells was 16.00 The maximum number of expansion shells was 16 The minimum number of expansion shells was 16 **** NOTA BENE **** This is the net solvation energy for this exact molecular structure (nuclear and electronic)! The standard-state solvation energy should be obtained as the difference between the heat of formation plus delta-G solvation for the relaxed solvated system and that for the relaxed gas-phase system. ZINC001334226170.mol2 53 1SCF run This is a breakdown of the solvation energy calculated without geometric relaxation in solution: (1) E-EN(sol) electronic-nuclear energy of solute -84.582 kcal (2) G-P(sol) polarization free energy of solvation -31.183 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -115.765 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.296 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -39.479 kcal (6) G-S(sol) free energy of system = (1) + (5) -124.061 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.63 seconds