Wall clock time and date at job start Wed Apr 1 2020 01:37:59 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 1.50697 * 1 3 3 C 1.38260 * 120.00121 * 2 1 4 4 C 1.38214 * 120.00102 * 180.02562 * 3 2 1 5 5 C 1.38261 * 120.00126 * 359.93799 * 4 3 2 6 6 C 1.38213 * 119.99676 * 0.04314 * 5 4 3 7 7 C 1.38216 * 119.99992 * 179.97438 * 2 1 3 8 8 C 1.50693 * 120.00237 * 359.97438 * 7 2 1 9 9 C 1.52998 * 109.47334 * 84.98048 * 8 7 2 10 10 H 1.09005 * 109.47063 * 304.99688 * 9 8 7 11 11 C 1.52997 * 109.47210 * 65.00087 * 9 8 7 12 12 C 1.50700 * 109.47199 * 185.00220 * 9 8 7 13 13 O 1.21278 * 120.00372 * 344.18057 * 12 9 8 14 14 N 1.34780 * 119.99850 * 164.17937 * 12 9 8 15 15 C 1.47162 * 120.70723 * 185.23920 * 14 12 9 16 16 C 1.54326 * 107.80033 * 132.68083 * 15 14 12 17 17 H 1.09005 * 112.53265 * 182.37680 * 16 15 14 18 18 C 1.54542 * 107.98710 * 306.73956 * 16 15 14 19 19 C 1.54285 * 104.84597 * 89.01607 * 18 16 15 20 20 C 1.54543 * 104.85084 * 359.97438 * 19 18 16 21 21 H 1.08996 * 112.67829 * 146.68140 * 20 19 18 22 22 C 1.47158 * 120.71137 * 5.51720 * 14 12 9 23 23 N 1.48306 * 107.10196 * 58.62195 * 16 15 14 24 24 C 1.36936 * 128.07860 * 106.56862 * 23 16 15 25 25 H 1.08002 * 120.00196 * 163.92208 * 24 23 16 26 26 C 1.38810 * 120.00238 * 343.92746 * 24 23 16 27 27 N 1.31618 * 119.99842 * 350.35850 * 26 24 23 28 28 Si 1.86802 * 120.00304 * 170.35565 * 26 24 23 29 29 H 1.48501 * 109.46797 * 90.00224 * 28 26 24 30 30 H 1.48498 * 109.47072 * 210.00406 * 28 26 24 31 31 H 1.48500 * 109.46668 * 330.00217 * 28 26 24 32 32 H 1.08996 * 109.46838 * 270.01426 * 1 2 3 33 33 H 1.08996 * 109.47641 * 30.01727 * 1 2 3 34 34 H 1.08999 * 109.47162 * 150.02287 * 1 2 3 35 35 H 1.07998 * 119.99666 * 0.02562 * 3 2 1 36 36 H 1.08002 * 119.99724 * 179.97438 * 4 3 2 37 37 H 1.07997 * 119.99812 * 180.31754 * 5 4 3 38 38 H 1.08002 * 119.99537 * 179.97438 * 6 5 4 39 39 H 1.09000 * 109.47546 * 204.97884 * 8 7 2 40 40 H 1.08999 * 109.47222 * 324.97544 * 8 7 2 41 41 H 1.09006 * 109.46864 * 293.68781 * 11 9 8 42 42 H 1.08990 * 109.47321 * 53.69102 * 11 9 8 43 43 H 1.09005 * 109.46980 * 173.69180 * 11 9 8 44 44 H 1.08994 * 109.75191 * 252.38688 * 15 14 12 45 45 H 1.09004 * 109.75443 * 13.12392 * 15 14 12 46 46 H 1.09004 * 110.36422 * 207.85745 * 18 16 15 47 47 H 1.09003 * 110.36554 * 330.17095 * 18 16 15 48 48 H 1.09001 * 110.36225 * 241.15923 * 19 18 16 49 49 H 1.09000 * 110.36121 * 118.84672 * 19 18 16 50 50 H 1.09002 * 109.74950 * 346.88208 * 22 14 12 51 51 H 1.09003 * 109.74933 * 107.56067 * 22 14 12 52 52 H 0.97003 * 120.00094 * 179.97438 * 27 26 24 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 1.5070 0.0000 0.0000 3 6 2.1983 1.1974 0.0000 4 6 3.5804 1.1973 -0.0005 5 6 4.2718 0.0000 0.0002 6 6 3.5806 -1.1969 0.0006 7 6 2.1980 -1.1970 0.0005 8 6 1.4446 -2.5021 0.0017 9 6 1.0798 -2.8816 -1.4348 10 1 0.5297 -2.0627 -1.8985 11 6 2.3578 -3.1529 -2.2310 12 6 0.2219 -4.1206 -1.4246 13 8 0.1637 -4.8098 -0.4284 14 7 -0.4809 -4.4627 -2.5226 15 6 -1.4113 -5.6026 -2.4944 16 6 -2.7385 -5.1442 -3.1348 17 1 -3.5017 -5.9222 -3.1164 18 6 -3.1984 -3.8584 -2.4113 19 6 -2.5361 -2.7057 -3.1943 20 6 -1.7357 -3.3998 -4.3194 21 1 -1.7013 -2.8105 -5.2357 22 6 -0.3297 -3.7082 -3.7770 23 7 -2.4260 -4.6982 -4.5143 24 6 -2.7083 -5.3364 -5.6925 25 1 -2.6617 -4.7938 -6.6252 26 6 -3.0545 -6.6806 -5.6882 27 7 -2.9289 -7.3889 -4.5860 28 14 -3.6987 -7.4843 -7.2466 29 1 -2.5610 -8.0354 -8.0258 30 1 -4.6314 -8.5828 -6.8879 31 1 -4.4157 -6.4735 -8.0647 32 1 -0.3633 0.0003 1.0276 33 1 -0.3634 0.8898 -0.5141 34 1 -0.3633 -0.8902 -0.5135 35 1 1.6583 2.1326 0.0004 36 1 4.1204 2.1327 -0.0010 37 1 5.3517 0.0000 0.0050 38 1 4.1207 -2.1322 0.0008 39 1 2.0698 -3.2822 0.4359 40 1 0.5344 -2.3956 0.5918 41 1 2.9250 -2.2277 -2.3339 42 1 2.9621 -3.8931 -1.7069 43 1 2.0968 -3.5309 -3.2195 44 1 -0.9927 -6.4338 -3.0618 45 1 -1.5857 -5.9103 -1.4634 46 1 -4.2841 -3.7689 -2.4503 47 1 -2.8542 -3.8613 -1.3770 48 1 -1.8663 -2.1419 -2.5451 49 1 -3.2962 -2.0494 -3.6183 50 1 0.2033 -2.7770 -3.5847 51 1 0.2229 -4.3059 -4.5020 52 1 -3.1712 -8.3282 -4.5828 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 ZINC001029601969.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Wed Apr 1 2020 01:37:59 Heat of formation + Delta-G solvation = 12.351211 kcal Electronic energy + Delta-G solvation = -31563.101455 eV Core-core repulsion = 27720.672226 eV Total energy + Delta-G solvation = -3842.429229 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 342.205 amu Computer time = 1.43 seconds Orbital eigenvalues (eV) -40.40765 -39.56461 -37.91392 -34.94153 -33.74947 -32.79797 -32.36733 -31.11346 -30.26882 -29.26997 -27.36364 -26.58609 -26.24814 -24.12600 -23.83059 -22.68977 -22.03278 -20.58866 -19.74092 -19.32113 -18.40494 -17.28346 -16.41050 -16.09731 -15.77688 -15.45209 -15.17090 -14.95720 -14.63775 -14.13486 -13.95659 -13.78048 -13.34485 -13.30558 -13.18537 -13.03764 -12.86963 -12.72057 -12.50483 -12.22162 -12.16591 -11.89716 -11.82150 -11.66800 -11.55607 -11.26145 -11.16017 -11.00079 -10.91405 -10.87338 -10.84218 -10.70683 -10.35645 -10.04186 -9.88128 -9.68898 -9.55720 -9.14223 -8.88969 -8.77268 -8.61967 -8.02268 -6.83793 -5.86149 -3.21613 1.23946 1.27960 3.14383 3.33997 3.40469 3.41805 3.54855 3.72936 4.39677 4.62877 4.69263 4.82901 4.88051 4.92360 5.06674 5.08197 5.12458 5.25366 5.30600 5.36897 5.45449 5.53833 5.56520 5.59960 5.65320 5.71555 5.74388 5.78812 5.79527 5.83226 5.84882 5.93838 5.97597 6.06251 6.18533 6.23891 6.25618 6.32529 6.38672 6.39235 6.41760 6.51583 6.61715 6.64644 6.69811 6.79197 6.86842 6.91854 7.01140 7.30668 7.49063 7.68576 8.11497 8.14054 8.74729 9.03611 9.66018 10.43057 11.26993 Molecular weight = 342.20amu Principal moments of inertia in cm(-1) A = 0.021762 B = 0.002852 C = 0.002806 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1286.350675 B = 9815.187465 C = 9974.714697 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.121 4.121 2 C -0.081 4.081 3 C -0.121 4.121 4 C -0.125 4.125 5 C -0.127 4.127 6 C -0.111 4.111 7 C -0.074 4.074 8 C -0.062 4.062 9 C -0.103 4.103 10 H 0.092 0.908 11 C -0.144 4.144 12 C 0.510 3.490 13 O -0.560 6.560 14 N -0.589 5.589 15 C 0.113 3.887 16 C 0.169 3.831 17 H 0.115 0.885 18 C -0.136 4.136 19 C -0.121 4.121 20 C 0.132 3.868 21 H 0.077 0.923 22 C 0.093 3.907 23 N -0.584 5.584 24 C -0.229 4.229 25 H 0.076 0.924 26 C -0.002 4.002 27 N -0.911 5.911 28 Si 0.911 3.089 29 H -0.289 1.289 30 H -0.290 1.290 31 H -0.281 1.281 32 H 0.070 0.930 33 H 0.066 0.934 34 H 0.072 0.928 35 H 0.119 0.881 36 H 0.118 0.882 37 H 0.118 0.882 38 H 0.121 0.879 39 H 0.079 0.921 40 H 0.078 0.922 41 H 0.065 0.935 42 H 0.059 0.941 43 H 0.063 0.937 44 H 0.079 0.921 45 H 0.066 0.934 46 H 0.053 0.947 47 H 0.052 0.948 48 H 0.050 0.950 49 H 0.055 0.945 50 H 0.068 0.932 51 H 0.065 0.935 52 H 0.255 0.745 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 10.050 15.637 7.747 20.138 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 -0.178 4.178 2 C -0.081 4.081 3 C -0.139 4.139 4 C -0.143 4.143 5 C -0.145 4.145 6 C -0.129 4.129 7 C -0.074 4.074 8 C -0.100 4.100 9 C -0.124 4.124 10 H 0.110 0.890 11 C -0.202 4.202 12 C 0.297 3.703 13 O -0.439 6.439 14 N -0.321 5.321 15 C -0.010 4.010 16 C 0.062 3.938 17 H 0.133 0.867 18 C -0.175 4.175 19 C -0.160 4.160 20 C 0.023 3.977 21 H 0.095 0.905 22 C -0.032 4.032 23 N -0.305 5.305 24 C -0.357 4.357 25 H 0.093 0.907 26 C -0.199 4.199 27 N -0.557 5.557 28 Si 0.741 3.259 29 H -0.216 1.216 30 H -0.216 1.216 31 H -0.207 1.207 32 H 0.089 0.911 33 H 0.085 0.915 34 H 0.091 0.909 35 H 0.137 0.863 36 H 0.136 0.864 37 H 0.136 0.864 38 H 0.139 0.861 39 H 0.098 0.902 40 H 0.097 0.903 41 H 0.084 0.916 42 H 0.078 0.922 43 H 0.082 0.918 44 H 0.097 0.903 45 H 0.085 0.915 46 H 0.072 0.928 47 H 0.071 0.929 48 H 0.069 0.931 49 H 0.073 0.927 50 H 0.086 0.914 51 H 0.083 0.917 52 H 0.065 0.935 Dipole moment (debyes) X Y Z Total from point charges 9.904 14.997 8.111 19.718 hybrid contribution -0.125 -0.419 -0.889 0.991 sum 9.779 14.578 7.222 18.982 Atomic orbital electron populations 1.20895 0.91219 1.03148 1.02513 1.19821 0.96091 0.92579 0.99570 1.21008 0.94247 0.97374 1.01224 1.21083 0.94311 0.97918 1.00945 1.21097 0.99673 0.92577 1.01132 1.21080 0.93617 0.98106 1.00069 1.19800 0.93657 0.94550 0.99438 1.20420 1.00523 0.93512 0.95521 1.21242 0.97158 0.96768 0.97241 0.88999 1.21839 0.96008 1.02201 1.00114 1.20441 0.80276 0.86498 0.83061 1.90635 1.65648 1.54218 1.33447 1.48201 1.41581 1.31945 1.10332 1.22494 0.90797 0.87307 1.00423 1.21923 0.94510 0.94165 0.83207 0.86738 1.22624 0.99238 0.97460 0.98172 1.22460 0.98741 0.97378 0.97461 1.21969 0.90114 0.89875 0.95701 0.90454 1.22585 0.99819 0.94938 0.85885 1.45167 1.64302 1.19051 1.01953 1.18966 1.40686 0.91523 0.84486 0.90663 1.24853 1.01935 0.95753 0.97388 1.69854 1.52070 1.07521 1.26233 0.86151 0.78449 0.78953 0.82324 1.21573 1.21607 1.20677 0.91114 0.91536 0.90929 0.86303 0.86436 0.86368 0.86093 0.90192 0.90344 0.91621 0.92190 0.91761 0.90300 0.91530 0.92848 0.92937 0.93102 0.92664 0.91423 0.91697 0.93468 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 17. 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 -0.12 -1.16 9.22 36.00 0.33 -0.83 16 2 C -0.08 -0.85 5.88 -104.62 -0.62 -1.47 16 3 C -0.12 -1.15 9.70 -39.58 -0.38 -1.53 16 4 C -0.12 -1.12 10.05 -39.58 -0.40 -1.52 16 5 C -0.13 -1.17 10.05 -39.58 -0.40 -1.57 16 6 C -0.11 -1.14 8.54 -39.58 -0.34 -1.48 16 7 C -0.07 -0.83 4.57 -104.63 -0.48 -1.31 16 8 C -0.06 -0.78 3.46 -27.89 -0.10 -0.88 16 9 C -0.10 -1.37 1.61 -91.77 -0.15 -1.52 16 10 H 0.09 1.15 5.85 -51.93 -0.30 0.85 16 11 C -0.14 -1.74 8.30 37.16 0.31 -1.43 16 12 C 0.51 9.01 6.92 -10.98 -0.08 8.93 16 13 O -0.56 -11.70 15.59 5.56 0.09 -11.62 16 14 N -0.59 -10.99 2.24 -171.30 -0.38 -11.37 16 15 C 0.11 2.47 5.81 -2.99 -0.02 2.45 16 16 C 0.17 3.79 3.12 -65.43 -0.20 3.59 16 17 H 0.12 2.93 6.45 -51.93 -0.34 2.59 16 18 C -0.14 -2.57 6.19 -25.25 -0.16 -2.72 16 19 C -0.12 -2.04 6.19 -25.25 -0.16 -2.19 16 20 C 0.13 2.46 4.31 -65.68 -0.28 2.17 16 21 H 0.08 1.36 8.14 -51.93 -0.42 0.94 16 22 C 0.09 1.58 4.63 -3.26 -0.02 1.57 16 23 N -0.58 -13.54 2.80 -152.36 -0.43 -13.97 16 24 C -0.23 -5.89 10.37 -15.06 -0.16 -6.04 16 25 H 0.08 1.89 7.85 -52.49 -0.41 1.48 16 26 C 0.00 -0.05 5.41 -17.43 -0.09 -0.14 16 27 N -0.91 -24.90 10.39 55.49 0.58 -24.32 16 28 Si 0.91 21.06 29.56 -169.99 -5.03 16.03 16 29 H -0.29 -6.72 7.11 56.52 0.40 -6.32 16 30 H -0.29 -6.83 7.11 56.52 0.40 -6.42 16 31 H -0.28 -6.39 7.11 56.52 0.40 -5.99 16 32 H 0.07 0.64 8.14 -51.93 -0.42 0.21 16 33 H 0.07 0.55 8.09 -51.93 -0.42 0.13 16 34 H 0.07 0.77 5.49 -51.93 -0.28 0.48 16 35 H 0.12 0.92 8.06 -52.49 -0.42 0.49 16 36 H 0.12 0.81 8.06 -52.49 -0.42 0.39 16 37 H 0.12 0.86 8.06 -52.49 -0.42 0.43 16 38 H 0.12 1.12 8.06 -52.49 -0.42 0.70 16 39 H 0.08 1.06 7.99 -51.93 -0.42 0.65 16 40 H 0.08 1.04 6.99 -51.93 -0.36 0.68 16 41 H 0.06 0.70 6.93 -51.93 -0.36 0.34 16 42 H 0.06 0.73 8.14 -51.93 -0.42 0.31 16 43 H 0.06 0.81 6.43 -51.93 -0.33 0.47 16 44 H 0.08 1.99 7.75 -51.93 -0.40 1.58 16 45 H 0.07 1.49 7.16 -51.93 -0.37 1.11 16 46 H 0.05 0.99 8.14 -51.93 -0.42 0.57 16 47 H 0.05 0.97 7.85 -51.93 -0.41 0.56 16 48 H 0.05 0.76 7.84 -51.93 -0.41 0.35 16 49 H 0.05 0.88 8.14 -51.93 -0.42 0.46 16 50 H 0.07 0.94 5.16 -51.93 -0.27 0.67 16 51 H 0.06 1.20 8.14 -51.93 -0.42 0.78 16 52 H 0.26 6.87 8.31 -40.82 -0.34 6.53 16 LS Contribution 393.43 15.07 5.93 5.93 Total: -1.00 -29.14 393.43 -11.06 -40.21 By element: Atomic # 1 Polarization: 13.47 SS G_CDS: -8.45 Total: 5.03 kcal Atomic # 6 Polarization: -2.55 SS G_CDS: -3.37 Total: -5.92 kcal Atomic # 7 Polarization: -49.42 SS G_CDS: -0.23 Total: -49.66 kcal Atomic # 8 Polarization: -11.70 SS G_CDS: 0.09 Total: -11.62 kcal Atomic # 14 Polarization: 21.06 SS G_CDS: -5.03 Total: 16.03 kcal Total LS contribution 5.93 Total: 5.93 kcal Total: -29.14 -11.06 -40.21 kcal The number of atoms in the molecule is 52 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. ZINC001029601969.mol2 52 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 52.559 kcal (2) G-P(sol) polarization free energy of solvation -29.143 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 23.415 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -11.064 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.207 kcal (6) G-S(sol) free energy of system = (1) + (5) 12.351 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.43 seconds