Wall clock time and date at job start Sat Apr 11 2020 04:54:05 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 C 1.53003 * 1 3 3 N 1.46501 * 109.47062 * 2 1 4 4 C 1.36941 * 119.99810 * 275.31085 * 3 2 1 5 5 H 1.08004 * 119.99649 * 37.57145 * 4 3 2 6 6 C 1.38810 * 120.00336 * 217.57889 * 4 3 2 7 7 N 1.31626 * 119.99803 * 21.42681 * 6 4 3 8 8 Si 1.86794 * 120.00219 * 201.43418 * 6 4 3 9 9 H 1.48500 * 109.47281 * 359.97438 * 8 6 4 10 10 H 1.48500 * 109.47511 * 119.99596 * 8 6 4 11 11 H 1.48508 * 109.46825 * 239.99586 * 8 6 4 12 12 C 1.46494 * 120.00422 * 95.30964 * 3 2 1 13 13 C 1.52999 * 109.47048 * 270.00094 * 12 3 2 14 14 C 1.53009 * 109.47114 * 179.97438 * 13 12 3 15 15 N 1.46501 * 109.46989 * 180.02562 * 14 13 12 16 16 C 1.34776 * 119.99330 * 180.27800 * 15 14 13 17 17 O 1.21280 * 120.00518 * 359.72399 * 16 15 14 18 18 C 1.50704 * 119.99713 * 179.72480 * 16 15 14 19 19 C 1.52996 * 109.47474 * 179.97438 * 18 16 15 20 20 H 1.08999 * 109.47145 * 305.00232 * 19 18 16 21 21 C 1.53002 * 109.47208 * 64.99448 * 19 18 16 22 22 N 1.46497 * 109.47364 * 184.99927 * 19 18 16 23 23 N 1.40082 * 126.03678 * 300.02260 * 22 19 18 24 24 C 1.30837 * 108.20826 * 180.02562 * 23 22 19 25 25 C 1.50695 * 125.90135 * 180.02562 * 24 23 22 26 26 C 1.39867 * 108.19788 * 0.02562 * 24 23 22 27 27 C 1.34949 * 126.03789 * 119.71742 * 22 19 18 28 28 C 1.50693 * 126.12668 * 359.97438 * 27 22 19 29 29 H 1.09005 * 109.46877 * 180.02562 * 1 2 3 30 30 H 1.08998 * 109.46781 * 299.99763 * 1 2 3 31 31 H 1.08992 * 109.47086 * 60.00411 * 1 2 3 32 32 H 1.08998 * 109.47228 * 239.99608 * 2 1 3 33 33 H 1.09005 * 109.47285 * 119.99761 * 2 1 3 34 34 H 0.96991 * 119.99936 * 180.02562 * 7 6 4 35 35 H 1.09004 * 109.47549 * 150.00013 * 12 3 2 36 36 H 1.09007 * 109.47059 * 29.99918 * 12 3 2 37 37 H 1.09001 * 109.47294 * 60.00296 * 13 12 3 38 38 H 1.08992 * 109.47402 * 299.99547 * 13 12 3 39 39 H 1.09001 * 109.46608 * 60.00109 * 14 13 12 40 40 H 1.08997 * 109.47092 * 300.00510 * 14 13 12 41 41 H 0.96996 * 119.99758 * 359.97438 * 15 14 13 42 42 H 1.09006 * 109.46777 * 299.99815 * 18 16 15 43 43 H 1.08994 * 109.47011 * 59.99367 * 18 16 15 44 44 H 1.08995 * 109.47214 * 180.02562 * 21 19 18 45 45 H 1.09001 * 109.47288 * 300.00882 * 21 19 18 46 46 H 1.09007 * 109.46713 * 60.00464 * 21 19 18 47 47 H 1.09007 * 109.46987 * 89.97498 * 25 24 23 48 48 H 1.08998 * 109.47380 * 209.97312 * 25 24 23 49 49 H 1.09001 * 109.47565 * 329.97842 * 25 24 23 50 50 H 1.08007 * 126.03562 * 179.97438 * 26 24 23 51 51 H 1.09001 * 109.47562 * 90.00033 * 28 27 22 52 52 H 1.09000 * 109.47096 * 210.00395 * 28 27 22 53 53 H 1.09009 * 109.47458 * 330.00188 * 28 27 22 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 6 1.5300 0.0000 0.0000 3 7 2.0183 1.3812 0.0000 4 6 2.1431 2.0633 -1.1809 5 1 1.4105 1.9277 -1.9628 6 6 3.2111 2.9289 -1.3730 7 7 4.3027 2.7981 -0.6493 8 14 3.0991 4.2796 -2.6585 9 1 1.7773 4.2135 -3.3321 10 1 3.2548 5.6023 -2.0017 11 1 4.1765 4.0963 -3.6641 12 6 2.3732 2.0328 1.2632 13 6 1.1426 2.7383 1.8364 14 6 1.5130 3.4183 3.1561 15 7 0.3345 4.0934 3.7053 16 6 0.4256 4.7686 4.8681 17 8 1.4819 4.8132 5.4624 18 6 -0.7851 5.4682 5.4300 19 6 -0.4135 6.1523 6.7471 20 1 0.0197 5.4194 7.4276 21 6 0.6054 7.2611 6.4761 22 7 -1.6153 6.7309 7.3530 23 7 -2.4405 7.7058 6.7779 24 6 -3.4092 7.9684 7.6172 25 6 -4.5235 8.9591 7.3987 26 6 -3.2319 7.1707 8.7523 27 6 -2.1261 6.4145 8.5613 28 6 -1.5631 5.4039 9.5270 29 1 -0.3633 -1.0277 0.0005 30 1 -0.3633 0.5138 0.8900 31 1 -0.3633 0.5137 -0.8900 32 1 1.8934 -0.5139 -0.8899 33 1 1.8934 -0.5138 0.8900 34 1 5.0488 3.4031 -0.7832 35 1 3.1617 2.7642 1.0859 36 1 2.7255 1.2834 1.9721 37 1 0.3541 2.0069 2.0139 38 1 0.7903 3.4876 1.1276 39 1 2.3016 4.1497 2.9790 40 1 1.8652 2.6687 3.8647 41 1 -0.5102 4.0580 3.2297 42 1 -1.1357 6.2157 4.7182 43 1 -1.5751 4.7392 5.6099 44 1 0.8705 7.7482 7.4145 45 1 1.4995 6.8307 6.0252 46 1 0.1722 7.9942 5.7955 47 1 -5.3641 8.4600 6.9163 48 1 -4.8436 9.3635 8.3589 49 1 -4.1691 9.7703 6.7627 50 1 -3.8682 7.1568 9.6249 51 1 -0.8544 5.8944 10.1943 52 1 -2.3737 4.9704 10.1129 53 1 -1.0540 4.6156 8.9723 RHF calculation, no. of doubly occupied orbitals= 65 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 ZINC001490360804.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 04:54:05 Heat of formation + Delta-G solvation = 36.567104 kcal Electronic energy + Delta-G solvation = -28924.078466 eV Core-core repulsion = 25025.450679 eV Total energy + Delta-G solvation = -3898.627787 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.227 amu Computer time = 1.41 seconds Orbital eigenvalues (eV) -41.56943 -39.80128 -36.59404 -35.73323 -34.75403 -33.04733 -31.88483 -31.54160 -31.07237 -28.92631 -28.06827 -27.75115 -27.19300 -25.17722 -23.66662 -22.41660 -21.08438 -20.75056 -20.49120 -19.91081 -19.03438 -17.40143 -16.75808 -16.25689 -15.99890 -15.69212 -15.34483 -15.10805 -14.64967 -14.29572 -14.06568 -13.84264 -13.67265 -13.64580 -13.52729 -13.44526 -13.24237 -12.99356 -12.71483 -12.63545 -12.44727 -12.38935 -12.19240 -11.93007 -11.61577 -11.57674 -11.46705 -11.39652 -11.16096 -11.04371 -10.78355 -10.62014 -10.60516 -10.46709 -10.07571 -9.85053 -9.65755 -9.56444 -9.24606 -8.91506 -8.68267 -8.49603 -6.58689 -5.80637 -3.39885 1.66069 2.19551 2.57533 2.59640 3.27618 3.33624 3.42399 3.44289 4.17706 4.33889 4.43293 4.45659 4.61348 4.73502 4.78962 4.92924 5.07754 5.14538 5.22616 5.26243 5.32400 5.36060 5.37565 5.41441 5.46858 5.55473 5.59484 5.61579 5.69011 5.78383 5.80481 5.94990 5.99336 6.05256 6.08040 6.25565 6.32759 6.39379 6.43699 6.53007 6.55556 6.71323 6.73725 6.86018 6.89144 7.06367 7.15150 7.54219 7.59306 7.65004 7.80899 8.21050 8.50553 9.17795 9.80034 10.38818 11.18812 Molecular weight = 336.23amu Principal moments of inertia in cm(-1) A = 0.015079 B = 0.002042 C = 0.001979 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1856.479011 B =13710.258356 C =14147.989385 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.165 4.165 2 C 0.140 3.860 3 N -0.585 5.585 4 C -0.259 4.259 5 H 0.059 0.941 6 C 0.012 3.988 7 N -0.886 5.886 8 Si 0.894 3.106 9 H -0.276 1.276 10 H -0.288 1.288 11 H -0.289 1.289 12 C 0.151 3.849 13 C -0.147 4.147 14 C 0.120 3.880 15 N -0.722 5.722 16 C 0.515 3.485 17 O -0.543 6.543 18 C -0.151 4.151 19 C 0.178 3.822 20 H 0.110 0.890 21 C -0.164 4.164 22 N -0.363 5.363 23 N -0.292 5.292 24 C 0.067 3.933 25 C -0.071 4.071 26 C -0.276 4.276 27 C 0.085 3.915 28 C -0.095 4.095 29 H 0.035 0.965 30 H 0.042 0.958 31 H 0.048 0.952 32 H 0.043 0.957 33 H 0.033 0.967 34 H 0.254 0.746 35 H 0.095 0.905 36 H 0.025 0.975 37 H 0.051 0.949 38 H 0.064 0.936 39 H 0.068 0.932 40 H 0.063 0.937 41 H 0.400 0.600 42 H 0.106 0.894 43 H 0.095 0.905 44 H 0.057 0.943 45 H 0.097 0.903 46 H 0.064 0.936 47 H 0.075 0.925 48 H 0.075 0.925 49 H 0.071 0.929 50 H 0.144 0.856 51 H 0.080 0.920 52 H 0.085 0.915 53 H 0.071 0.929 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -14.986 6.594 19.592 25.533 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 -0.225 4.225 2 C 0.014 3.986 3 N -0.305 5.305 4 C -0.389 4.389 5 H 0.077 0.923 6 C -0.188 4.188 7 N -0.528 5.528 8 Si 0.724 3.276 9 H -0.201 1.201 10 H -0.214 1.214 11 H -0.216 1.216 12 C 0.024 3.976 13 C -0.187 4.187 14 C -0.003 4.003 15 N -0.372 5.372 16 C 0.300 3.700 17 O -0.421 6.421 18 C -0.192 4.192 19 C 0.076 3.924 20 H 0.128 0.872 21 C -0.222 4.222 22 N -0.146 5.146 23 N -0.114 5.114 24 C -0.099 4.099 25 C -0.130 4.130 26 C -0.306 4.306 27 C -0.042 4.042 28 C -0.154 4.154 29 H 0.054 0.946 30 H 0.061 0.939 31 H 0.067 0.933 32 H 0.061 0.939 33 H 0.051 0.949 34 H 0.064 0.936 35 H 0.113 0.887 36 H 0.043 0.957 37 H 0.069 0.931 38 H 0.083 0.917 39 H 0.086 0.914 40 H 0.081 0.919 41 H 0.234 0.766 42 H 0.124 0.876 43 H 0.114 0.886 44 H 0.076 0.924 45 H 0.115 0.885 46 H 0.083 0.917 47 H 0.093 0.907 48 H 0.094 0.906 49 H 0.090 0.910 50 H 0.161 0.839 51 H 0.099 0.901 52 H 0.104 0.896 53 H 0.090 0.910 Dipole moment (debyes) X Y Z Total from point charges -13.383 6.878 18.779 24.063 hybrid contribution -0.900 0.521 -0.131 1.048 sum -14.283 7.398 18.649 24.627 Atomic orbital electron populations 1.22368 1.00178 0.98887 1.01088 1.20851 0.91660 0.87405 0.98729 1.43750 1.76041 1.08190 1.02497 1.19016 1.04634 1.21132 0.94139 0.92295 1.25196 0.94225 1.01332 0.98081 1.70007 1.03205 1.37232 1.42390 0.86371 0.77680 0.82303 0.81282 1.20110 1.21407 1.21610 1.20792 0.94410 0.96644 0.85776 1.22547 1.02417 0.99901 0.93881 1.21516 0.86976 0.96153 0.95681 1.46182 1.14729 1.53154 1.23136 1.20244 0.89604 0.78919 0.81239 1.90684 1.30319 1.61391 1.59752 1.21974 0.97732 1.01342 0.98150 1.20985 0.81362 0.95729 0.94296 0.87240 1.22241 0.99498 0.97737 1.02674 1.48800 1.21668 1.31131 1.12994 1.77283 1.04629 1.07698 1.21824 1.22302 0.96237 0.98471 0.92851 1.20147 0.93933 0.96129 1.02744 1.21078 1.02234 1.05016 1.02224 1.21131 0.95580 0.99063 0.88465 1.20490 1.01843 0.96105 0.96939 0.94629 0.93855 0.93255 0.93869 0.94851 0.93553 0.88733 0.95688 0.93066 0.91694 0.91388 0.91904 0.76614 0.87551 0.88632 0.92385 0.88462 0.91657 0.90675 0.90640 0.91046 0.83870 0.90109 0.89597 0.90975 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 -0.17 -2.92 10.21 37.16 0.38 -2.54 16 2 C 0.14 2.90 6.44 -4.04 -0.03 2.87 16 3 N -0.58 -14.04 2.43 -173.23 -0.42 -14.46 16 4 C -0.26 -6.90 9.45 -15.06 -0.14 -7.04 16 5 H 0.06 1.58 7.92 -52.48 -0.42 1.16 16 6 C 0.01 0.33 4.95 -17.43 -0.09 0.24 16 7 N -0.89 -25.09 11.47 55.49 0.64 -24.46 16 8 Si 0.89 21.25 29.60 -169.99 -5.03 16.21 16 9 H -0.28 -6.44 7.11 56.52 0.40 -6.04 16 10 H -0.29 -6.87 7.11 56.52 0.40 -6.47 16 11 H -0.29 -6.94 7.11 56.52 0.40 -6.54 16 12 C 0.15 3.35 5.33 -4.05 -0.02 3.33 16 13 C -0.15 -2.64 5.65 -26.73 -0.15 -2.79 16 14 C 0.12 1.93 5.67 -4.04 -0.02 1.90 16 15 N -0.72 -9.52 5.56 -60.29 -0.33 -9.85 16 16 C 0.51 6.80 7.55 -10.98 -0.08 6.72 16 17 O -0.54 -8.79 13.96 5.56 0.08 -8.71 16 18 C -0.15 -1.59 5.43 -27.88 -0.15 -1.74 16 19 C 0.18 1.92 2.76 -67.93 -0.19 1.74 16 20 H 0.11 1.11 6.49 -51.93 -0.34 0.78 16 21 C -0.16 -1.88 9.19 37.16 0.34 -1.54 16 22 N -0.36 -4.10 3.28 -50.70 -0.17 -4.27 16 23 N -0.29 -3.67 12.43 33.67 0.42 -3.25 16 24 C 0.07 0.72 7.22 -82.41 -0.59 0.13 16 25 C -0.07 -0.51 10.45 36.00 0.38 -0.14 16 26 C -0.28 -2.68 10.65 -40.01 -0.43 -3.10 16 27 C 0.09 0.84 6.93 -82.27 -0.57 0.27 16 28 C -0.10 -0.62 9.95 36.00 0.36 -0.26 16 29 H 0.03 0.53 8.14 -51.93 -0.42 0.11 16 30 H 0.04 0.73 6.64 -51.93 -0.34 0.39 16 31 H 0.05 0.92 8.14 -51.93 -0.42 0.49 16 32 H 0.04 0.92 8.08 -51.93 -0.42 0.51 16 33 H 0.03 0.65 7.83 -51.93 -0.41 0.24 16 34 H 0.25 6.96 8.31 -40.82 -0.34 6.62 16 35 H 0.10 2.42 5.52 -51.93 -0.29 2.13 16 36 H 0.02 0.53 7.86 -51.92 -0.41 0.12 16 37 H 0.05 0.86 6.64 -51.93 -0.34 0.52 16 38 H 0.06 1.26 8.14 -51.93 -0.42 0.84 16 39 H 0.07 1.21 8.14 -51.93 -0.42 0.79 16 40 H 0.06 1.02 8.14 -51.93 -0.42 0.60 16 41 H 0.40 4.39 8.47 -40.82 -0.35 4.05 16 42 H 0.11 1.13 8.14 -51.93 -0.42 0.70 16 43 H 0.10 0.89 8.14 -51.93 -0.42 0.47 16 44 H 0.06 0.63 8.14 -51.93 -0.42 0.21 16 45 H 0.10 1.25 5.95 -51.93 -0.31 0.94 16 46 H 0.06 0.78 8.14 -51.93 -0.42 0.36 16 47 H 0.07 0.47 8.14 -51.92 -0.42 0.05 16 48 H 0.07 0.41 8.14 -51.93 -0.42 -0.02 16 49 H 0.07 0.52 8.14 -51.93 -0.42 0.09 16 50 H 0.14 1.06 8.06 -52.48 -0.42 0.63 16 51 H 0.08 0.46 8.14 -51.93 -0.42 0.03 16 52 H 0.09 0.42 8.14 -51.93 -0.42 -0.01 16 53 H 0.07 0.46 7.10 -51.92 -0.37 0.09 16 LS Contribution 426.75 15.07 6.43 6.43 Total: -1.00 -31.59 426.75 -8.86 -40.45 By element: Atomic # 1 Polarization: 13.32 SS G_CDS: -9.46 Total: 3.86 kcal Atomic # 6 Polarization: -0.95 SS G_CDS: -1.01 Total: -1.96 kcal Atomic # 7 Polarization: -56.42 SS G_CDS: 0.13 Total: -56.29 kcal Atomic # 8 Polarization: -8.79 SS G_CDS: 0.08 Total: -8.71 kcal Atomic # 14 Polarization: 21.25 SS G_CDS: -5.03 Total: 16.21 kcal Total LS contribution 6.43 Total: 6.43 kcal Total: -31.59 -8.86 -40.45 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. ZINC001490360804.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 77.021 kcal (2) G-P(sol) polarization free energy of solvation -31.592 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 45.430 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.863 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.454 kcal (6) G-S(sol) free energy of system = (1) + (5) 36.567 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.42 seconds