Wall clock time and date at job start Sat Apr 11 2020 06:11:35 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 1.53005 * 1 3 3 O 1.42903 * 109.47089 * 2 1 4 4 C 1.42894 * 113.99873 * 179.97438 * 3 2 1 5 5 H 1.08996 * 112.87706 * 21.78383 * 4 3 2 6 6 C 1.53898 * 113.64472 * 250.49660 * 4 3 2 7 7 C 1.53895 * 87.19228 * 220.44423 * 6 4 3 8 8 H 1.09001 * 113.64349 * 270.37722 * 7 6 4 9 9 N 1.46500 * 113.64554 * 139.46653 * 7 6 4 10 10 C 1.34774 * 120.00108 * 157.66493 * 9 7 6 11 11 O 1.21277 * 119.99858 * 359.97438 * 10 9 7 12 12 C 1.50694 * 119.99913 * 180.02562 * 10 9 7 13 13 H 1.09000 * 109.47606 * 319.99654 * 12 10 9 14 14 N 1.46903 * 109.46927 * 199.99402 * 12 10 9 15 15 C 1.53006 * 109.47314 * 80.00064 * 12 10 9 16 16 C 1.53001 * 109.47099 * 184.99888 * 15 12 10 17 17 C 1.52995 * 109.47044 * 179.97438 * 16 15 12 18 18 C 1.50699 * 109.47281 * 180.02562 * 17 16 15 19 19 H 1.08003 * 119.99760 * 359.72190 * 18 17 16 20 20 C 1.37873 * 120.00504 * 180.02562 * 18 17 16 21 21 N 1.31523 * 119.99522 * 359.71842 * 20 18 17 22 22 Si 1.86793 * 120.00470 * 179.72323 * 20 18 17 23 23 H 1.48496 * 109.47144 * 359.97438 * 22 20 18 24 24 H 1.48502 * 109.47517 * 119.99491 * 22 20 18 25 25 H 1.48498 * 109.47345 * 239.99439 * 22 20 18 26 26 C 1.53153 * 86.89764 * 24.96517 * 7 6 4 27 27 C 1.53516 * 114.90776 * 91.39169 * 26 7 6 28 28 C 1.54973 * 103.89255 * 131.94812 * 27 26 7 29 29 C 1.55044 * 102.11750 * 20.86066 * 28 27 26 30 30 O 1.43060 * 115.22958 * 218.02082 * 26 7 6 31 31 H 1.09010 * 109.46658 * 59.99676 * 1 2 3 32 32 H 1.08994 * 109.47354 * 179.97438 * 1 2 3 33 33 H 1.09000 * 109.47099 * 300.00192 * 1 2 3 34 34 H 1.09004 * 109.46885 * 240.00532 * 2 1 3 35 35 H 1.08996 * 109.46771 * 120.00202 * 2 1 3 36 36 H 1.08995 * 113.59746 * 105.86728 * 6 4 3 37 37 H 1.09001 * 113.66785 * 335.03273 * 6 4 3 38 38 H 0.97002 * 119.99575 * 337.66202 * 9 7 6 39 39 H 1.00899 * 111.00536 * 300.00080 * 14 12 10 40 40 H 1.00908 * 110.99422 * 63.95574 * 14 12 10 41 41 H 1.08992 * 109.47130 * 64.99585 * 15 12 10 42 42 H 1.09000 * 109.46853 * 304.99633 * 15 12 10 43 43 H 1.09002 * 109.46908 * 59.99611 * 16 15 12 44 44 H 1.09000 * 109.47060 * 299.99618 * 16 15 12 45 45 H 1.09002 * 109.47303 * 60.00199 * 17 16 15 46 46 H 1.09000 * 109.47162 * 299.99901 * 17 16 15 47 47 H 0.97002 * 119.99510 * 180.02562 * 21 20 18 48 48 H 1.09004 * 110.54477 * 250.55320 * 27 26 7 49 49 H 1.08999 * 110.54650 * 13.35122 * 27 26 7 50 50 H 1.09008 * 110.87388 * 139.01284 * 28 27 26 51 51 H 1.08997 * 110.87758 * 262.70366 * 28 27 26 52 52 H 1.08996 * 110.59827 * 81.88820 * 29 28 27 53 53 H 1.09009 * 110.58995 * 204.82106 * 29 28 27 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 8 2.0064 1.3473 0.0000 4 6 3.4309 1.4601 0.0006 5 1 3.9270 0.5639 -0.3717 6 6 4.0084 1.9782 1.3296 7 6 4.9869 2.8182 0.4897 8 1 5.9170 2.3007 0.2548 9 7 5.2035 4.1683 1.0155 10 6 6.3210 4.8474 0.6891 11 8 7.1474 4.3406 -0.0395 12 6 6.5440 6.2359 1.2305 13 1 5.6031 6.7861 1.2186 14 7 7.5303 6.9344 0.3955 15 6 7.0641 6.1460 2.6667 16 6 7.1722 7.5526 3.2589 17 6 7.6916 7.4626 4.6952 18 6 7.7975 8.8479 5.2788 19 1 7.5261 9.7070 4.6832 20 6 8.2468 9.0192 6.5710 21 7 8.5776 7.9731 7.2962 22 14 8.3854 10.7369 7.2918 23 1 7.9559 11.7347 6.2793 24 1 7.5159 10.8422 8.4910 25 1 9.7950 10.9994 7.6780 26 6 3.9467 2.7557 -0.6326 27 6 2.9392 3.9140 -0.6457 28 6 2.9310 4.3834 -2.1226 29 6 3.4865 3.1393 -2.8626 30 8 4.4812 2.6180 -1.9525 31 1 -0.3633 0.5139 -0.8901 32 1 -0.3634 -1.0276 -0.0005 33 1 -0.3633 0.5139 0.8900 34 1 1.8934 -0.5138 -0.8901 35 1 1.8933 -0.5139 0.8899 36 1 4.4959 1.2057 1.9242 37 1 3.3052 2.5769 1.9086 38 1 4.5426 4.5734 1.5986 39 1 8.4120 6.4438 0.3902 40 1 7.1827 7.0637 -0.5430 41 1 8.0467 5.6745 2.6684 42 1 6.3747 5.5513 3.2661 43 1 6.1894 8.0240 3.2572 44 1 7.8615 8.1472 2.6595 45 1 8.6743 6.9910 4.6973 46 1 7.0020 6.8681 5.2944 47 1 8.8934 8.0935 8.2055 48 1 1.9502 3.5641 -0.3499 49 1 3.2730 4.7187 0.0094 50 1 1.9171 4.6106 -2.4522 51 1 3.5872 5.2426 -2.2608 52 1 2.6965 2.4068 -3.0277 53 1 3.9459 3.4289 -3.8077 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 ZINC001578091294.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 06:11:35 Heat of formation + Delta-G solvation = -122.649008 kcal Electronic energy + Delta-G solvation = -30690.057964 eV Core-core repulsion = 26561.777245 eV Total energy + Delta-G solvation = -4128.280719 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.66 seconds Orbital eigenvalues (eV) -41.42071 -39.58583 -38.06608 -36.53466 -35.59186 -33.37941 -33.26312 -32.30722 -31.32772 -31.22897 -27.98302 -27.80531 -25.76834 -24.13650 -23.49969 -23.23322 -22.30924 -22.08434 -20.14538 -19.98888 -19.46661 -17.52930 -17.39480 -16.88087 -16.54998 -16.29543 -15.96032 -15.89572 -15.69884 -15.56875 -14.52128 -14.43438 -14.37438 -13.95699 -13.84710 -13.75054 -13.49484 -13.03820 -12.95678 -12.63221 -12.54399 -12.38044 -12.22095 -11.93047 -11.77110 -11.72334 -11.65083 -11.47389 -11.42994 -11.14008 -11.06883 -10.90000 -10.74879 -10.57719 -10.40602 -10.38429 -10.15402 -9.73350 -9.59177 -9.21468 -9.11500 -9.01081 -8.53610 -8.28681 -5.94354 -3.95755 2.55986 2.82978 3.34669 3.38273 3.42078 3.46861 3.63959 4.01095 4.03903 4.28849 4.34403 4.50672 4.53398 4.61246 4.62831 4.64958 4.72970 4.81565 4.87151 4.94182 5.01820 5.04708 5.19736 5.26842 5.35030 5.38542 5.41432 5.42802 5.43909 5.48114 5.52619 5.61577 5.63515 5.70389 5.73449 5.83870 5.95213 6.14036 6.28606 6.46169 6.60065 6.83888 6.83988 7.02988 7.11581 7.26242 7.40056 7.53996 7.76521 7.91923 8.07563 8.14811 8.50966 9.12213 9.67981 11.17119 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.015939 B = 0.002121 C = 0.001987 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1756.235376 B =13196.157842 C =14088.611756 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.151 4.151 2 C 0.055 3.945 3 O -0.368 6.368 4 C 0.057 3.943 5 H 0.097 0.903 6 C -0.160 4.160 7 C 0.138 3.862 8 H 0.122 0.878 9 N -0.715 5.715 10 C 0.484 3.516 11 O -0.541 6.541 12 C 0.078 3.922 13 H 0.099 0.901 14 N -0.811 5.811 15 C -0.103 4.103 16 C -0.100 4.100 17 C 0.019 3.981 18 C -0.515 4.515 19 H 0.056 0.944 20 C 0.054 3.946 21 N -0.897 5.897 22 Si 0.891 3.109 23 H -0.273 1.273 24 H -0.285 1.285 25 H -0.285 1.285 26 C 0.075 3.925 27 C -0.127 4.127 28 C -0.151 4.151 29 C 0.047 3.953 30 O -0.354 6.354 31 H 0.062 0.938 32 H 0.070 0.930 33 H 0.064 0.936 34 H 0.048 0.952 35 H 0.050 0.950 36 H 0.087 0.913 37 H 0.101 0.899 38 H 0.404 0.596 39 H 0.350 0.650 40 H 0.338 0.662 41 H 0.062 0.938 42 H 0.062 0.938 43 H 0.044 0.956 44 H 0.063 0.937 45 H 0.014 0.986 46 H 0.012 0.988 47 H 0.258 0.742 48 H 0.093 0.907 49 H 0.080 0.920 50 H 0.080 0.920 51 H 0.075 0.925 52 H 0.060 0.940 53 H 0.090 0.910 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -17.322 -16.521 -19.260 30.724 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 -0.209 4.209 2 C -0.022 4.022 3 O -0.287 6.287 4 C -0.002 4.002 5 H 0.114 0.886 6 C -0.199 4.199 7 C 0.031 3.969 8 H 0.140 0.860 9 N -0.367 5.367 10 C 0.270 3.730 11 O -0.417 6.417 12 C -0.038 4.038 13 H 0.117 0.883 14 N -0.339 5.339 15 C -0.142 4.142 16 C -0.137 4.137 17 C -0.018 4.018 18 C -0.553 4.553 19 H 0.074 0.926 20 C -0.147 4.147 21 N -0.537 5.537 22 Si 0.719 3.281 23 H -0.197 1.197 24 H -0.211 1.211 25 H -0.211 1.211 26 C 0.033 3.967 27 C -0.164 4.164 28 C -0.189 4.189 29 C -0.030 4.030 30 O -0.272 6.272 31 H 0.081 0.919 32 H 0.089 0.911 33 H 0.083 0.917 34 H 0.066 0.934 35 H 0.068 0.932 36 H 0.106 0.894 37 H 0.119 0.881 38 H 0.240 0.760 39 H 0.164 0.836 40 H 0.149 0.851 41 H 0.081 0.919 42 H 0.081 0.919 43 H 0.063 0.937 44 H 0.082 0.918 45 H 0.032 0.968 46 H 0.030 0.970 47 H 0.068 0.932 48 H 0.111 0.889 49 H 0.099 0.901 50 H 0.098 0.902 51 H 0.093 0.907 52 H 0.078 0.922 53 H 0.108 0.892 Dipole moment (debyes) X Y Z Total from point charges -16.626 -16.226 -19.159 30.113 hybrid contribution -0.297 -0.129 0.209 0.386 sum -16.923 -16.355 -18.950 30.216 Atomic orbital electron populations 1.21748 0.93663 1.02313 1.03139 1.22538 0.95606 0.83837 1.00169 1.87902 1.19844 1.26398 1.94546 1.23915 0.81723 0.98612 0.95972 0.88562 1.23688 0.98537 1.00438 0.97227 1.22204 0.98299 0.84183 0.92211 0.86032 1.46036 1.23140 1.16177 1.51345 1.22607 0.80599 0.89754 0.80059 1.90687 1.44010 1.70046 1.36929 1.21770 0.98015 0.87740 0.96251 0.88296 1.59052 1.06116 1.52609 1.16141 1.21651 1.00983 1.01095 0.90428 1.21536 1.00712 0.92739 0.98758 1.19127 0.96111 0.96881 0.89711 1.21322 1.43076 0.93082 0.97836 0.92607 1.25042 0.95654 0.96664 0.97329 1.69987 1.45317 1.29015 1.09416 0.86556 0.77612 0.84927 0.79028 1.19723 1.21128 1.21102 1.24031 0.94027 0.94264 0.84417 1.22483 0.99832 0.96664 0.97456 1.23116 1.02021 0.98722 0.95031 1.23577 0.91460 0.94169 0.93778 1.88860 1.40274 1.83096 1.14966 0.91937 0.91105 0.91733 0.93388 0.93176 0.89391 0.88106 0.76030 0.83557 0.85051 0.91918 0.91907 0.93697 0.91838 0.96796 0.96951 0.93191 0.88876 0.90104 0.90163 0.90665 0.92160 0.89177 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 -0.15 -0.80 10.28 37.16 0.38 -0.42 16 2 C 0.05 0.35 6.51 37.16 0.24 0.60 16 3 O -0.37 -3.12 8.81 -35.23 -0.31 -3.43 16 4 C 0.06 0.49 4.08 -26.18 -0.11 0.38 16 5 H 0.10 0.79 7.90 -51.93 -0.41 0.38 16 6 C -0.16 -1.29 7.48 -25.80 -0.19 -1.49 16 7 C 0.14 1.44 4.01 -67.39 -0.27 1.17 16 8 H 0.12 1.54 7.53 -51.93 -0.39 1.15 16 9 N -0.71 -7.64 4.08 -53.28 -0.22 -7.85 16 10 C 0.48 6.59 7.07 -10.99 -0.08 6.51 16 11 O -0.54 -9.19 15.88 5.56 0.09 -9.10 16 12 C 0.08 1.06 3.15 -68.86 -0.22 0.84 16 13 H 0.10 1.19 8.14 -51.93 -0.42 0.77 16 14 N -0.81 -11.23 8.44 -5.65 -0.05 -11.28 16 15 C -0.10 -1.70 4.84 -26.73 -0.13 -1.82 16 16 C -0.10 -2.03 5.04 -26.73 -0.13 -2.16 16 17 C 0.02 0.49 4.97 -27.89 -0.14 0.35 16 18 C -0.51 -14.76 9.11 -34.44 -0.31 -15.07 16 19 H 0.06 1.56 7.74 -52.48 -0.41 1.16 16 20 C 0.05 1.56 5.46 -17.82 -0.10 1.46 16 21 N -0.90 -27.32 13.29 55.43 0.74 -26.58 16 22 Si 0.89 21.94 29.54 -169.99 -5.02 16.92 16 23 H -0.27 -6.56 7.11 56.52 0.40 -6.16 16 24 H -0.29 -6.92 7.11 56.52 0.40 -6.52 16 25 H -0.28 -6.96 7.11 56.52 0.40 -6.56 16 26 C 0.07 0.75 1.48 -90.20 -0.13 0.61 16 27 C -0.13 -1.11 6.09 -25.42 -0.15 -1.27 16 28 C -0.15 -1.25 7.16 -24.61 -0.18 -1.42 16 29 C 0.05 0.42 7.73 38.24 0.30 0.72 16 30 O -0.35 -4.26 11.28 -35.23 -0.40 -4.66 16 31 H 0.06 0.34 8.14 -51.92 -0.42 -0.08 16 32 H 0.07 0.27 8.14 -51.93 -0.42 -0.15 16 33 H 0.06 0.36 8.14 -51.93 -0.42 -0.06 16 34 H 0.05 0.29 8.14 -51.93 -0.42 -0.14 16 35 H 0.05 0.29 8.14 -51.93 -0.42 -0.13 16 36 H 0.09 0.64 8.14 -51.93 -0.42 0.21 16 37 H 0.10 0.76 8.10 -51.93 -0.42 0.34 16 38 H 0.40 3.47 8.06 -40.82 -0.33 3.14 16 39 H 0.35 5.08 8.58 -39.29 -0.34 4.75 16 40 H 0.34 4.11 9.06 -39.29 -0.36 3.76 16 41 H 0.06 1.11 8.14 -51.93 -0.42 0.68 16 42 H 0.06 0.97 8.14 -51.93 -0.42 0.54 16 43 H 0.04 0.88 8.14 -51.93 -0.42 0.46 16 44 H 0.06 1.34 7.75 -51.93 -0.40 0.94 16 45 H 0.01 0.38 8.14 -51.93 -0.42 -0.04 16 46 H 0.01 0.33 8.14 -51.93 -0.42 -0.09 16 47 H 0.26 7.40 8.31 -40.82 -0.34 7.06 16 48 H 0.09 0.80 6.70 -51.93 -0.35 0.46 16 49 H 0.08 0.69 6.20 -51.93 -0.32 0.37 16 50 H 0.08 0.53 8.14 -51.92 -0.42 0.11 16 51 H 0.07 0.66 8.14 -51.93 -0.42 0.24 16 52 H 0.06 0.49 8.14 -51.93 -0.42 0.06 16 53 H 0.09 0.72 8.14 -51.92 -0.42 0.29 16 LS Contribution 423.30 15.07 6.38 6.38 Total: -1.00 -34.06 423.30 -9.64 -43.69 By element: Atomic # 1 Polarization: 16.55 SS G_CDS: -9.62 Total: 6.92 kcal Atomic # 6 Polarization: -9.79 SS G_CDS: -1.22 Total: -11.01 kcal Atomic # 7 Polarization: -46.19 SS G_CDS: 0.47 Total: -45.72 kcal Atomic # 8 Polarization: -16.57 SS G_CDS: -0.62 Total: -17.18 kcal Atomic # 14 Polarization: 21.94 SS G_CDS: -5.02 Total: 16.92 kcal Total LS contribution 6.38 Total: 6.38 kcal Total: -34.06 -9.64 -43.69 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. ZINC001578091294.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 -78.955 kcal (2) G-P(sol) polarization free energy of solvation -34.059 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -113.013 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.636 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.694 kcal (6) G-S(sol) free energy of system = (1) + (5) -122.649 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.66 seconds