Wall clock time and date at job start Sat Apr 11 2020 06:13:06 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 1.45199 * 1 3 3 C 1.34229 * 116.99864 * 2 1 4 4 O 1.20825 * 120.00156 * 0.02562 * 3 2 1 5 5 C 1.50697 * 119.99953 * 180.02562 * 3 2 1 6 6 C 1.53000 * 109.47320 * 180.02562 * 5 3 2 7 7 C 1.53005 * 109.47261 * 179.97438 * 6 5 3 8 8 H 1.09002 * 109.53194 * 54.90290 * 7 6 5 9 9 C 1.53096 * 109.48925 * 294.81142 * 7 6 5 10 10 C 1.53119 * 109.15347 * 182.39926 * 9 7 6 11 11 C 1.53040 * 109.28020 * 57.65257 * 10 9 7 12 12 N 1.46846 * 109.52161 * 300.82253 * 11 10 9 13 13 C 1.46903 * 110.99876 * 185.84046 * 12 11 10 14 14 H 1.09003 * 109.46752 * 297.82370 * 13 12 11 15 15 C 1.53001 * 109.47177 * 177.82857 * 13 12 11 16 16 C 1.50693 * 109.47054 * 57.82202 * 13 12 11 17 17 O 1.21281 * 119.99997 * 30.57878 * 16 13 12 18 18 N 1.34778 * 120.00174 * 210.56990 * 16 13 12 19 19 C 1.46500 * 119.99751 * 354.76159 * 18 16 13 20 20 C 1.46498 * 120.00278 * 174.76074 * 18 16 13 21 21 C 1.50706 * 109.47008 * 90.00175 * 20 18 16 22 22 H 1.07993 * 119.99801 * 359.97438 * 21 20 18 23 23 C 1.37878 * 119.99804 * 180.02562 * 21 20 18 24 24 N 1.31514 * 119.99970 * 359.97438 * 23 21 20 25 25 Si 1.86794 * 119.99885 * 180.02562 * 23 21 20 26 26 H 1.48496 * 109.47241 * 59.99876 * 25 23 21 27 27 H 1.48508 * 109.47080 * 179.97438 * 25 23 21 28 28 H 1.48503 * 109.47158 * 299.99456 * 25 23 21 29 29 C 1.46846 * 111.20004 * 61.74284 * 12 11 10 30 30 H 1.09000 * 109.47492 * 59.99488 * 1 2 3 31 31 H 1.09002 * 109.47389 * 180.02562 * 1 2 3 32 32 H 1.08999 * 109.46831 * 299.99495 * 1 2 3 33 33 H 1.09002 * 109.47757 * 59.99783 * 5 3 2 34 34 H 1.08999 * 109.47239 * 300.00052 * 5 3 2 35 35 H 1.09001 * 109.47084 * 59.99992 * 6 5 3 36 36 H 1.08999 * 109.47426 * 299.99883 * 6 5 3 37 37 H 1.08993 * 109.52491 * 62.49602 * 9 7 6 38 38 H 1.09006 * 109.57648 * 302.33063 * 9 7 6 39 39 H 1.08998 * 109.50333 * 297.71419 * 10 9 7 40 40 H 1.09005 * 109.53676 * 177.61327 * 10 9 7 41 41 H 1.08997 * 109.46212 * 180.80643 * 11 10 9 42 42 H 1.09005 * 109.44927 * 60.83025 * 11 10 9 43 43 H 1.09001 * 109.47130 * 65.83002 * 15 13 12 44 44 H 1.08998 * 109.46833 * 185.83171 * 15 13 12 45 45 H 1.09003 * 109.46728 * 305.83090 * 15 13 12 46 46 H 1.09002 * 109.46997 * 94.50740 * 19 18 16 47 47 H 1.09003 * 109.47122 * 214.50401 * 19 18 16 48 48 H 1.09002 * 109.47548 * 334.50501 * 19 18 16 49 49 H 1.08995 * 109.47202 * 210.00470 * 20 18 16 50 50 H 1.09000 * 109.47182 * 330.00432 * 20 18 16 51 51 H 0.97000 * 120.00041 * 180.02562 * 24 23 21 52 52 H 1.08991 * 109.46435 * 58.26917 * 29 12 11 53 53 H 1.08998 * 109.46136 * 178.25322 * 29 12 11 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 1.4520 0.0000 0.0000 3 6 2.0613 1.1960 0.0000 4 8 1.4033 2.2093 0.0005 5 6 3.5663 1.2749 -0.0006 6 6 4.0001 2.7421 0.0002 7 6 5.5280 2.8222 0.0002 8 1 5.9229 2.2518 -0.8406 9 6 6.0698 2.2434 1.3100 10 6 7.5946 2.3820 1.3277 11 6 7.9700 3.8566 1.1644 12 7 7.4292 4.3631 -0.1034 13 6 7.8862 5.7355 -0.3598 14 1 7.5191 6.3937 0.4276 15 6 7.3479 6.2081 -1.7118 16 6 9.3927 5.7677 -0.3798 17 8 10.0152 4.7950 -0.7502 18 7 10.0483 6.8776 0.0137 19 6 9.2987 8.0902 0.3513 20 6 11.5105 6.8715 0.1040 21 6 12.0971 7.2984 -1.2169 22 1 11.4459 7.5488 -2.0412 23 6 13.4652 7.3683 -1.3732 24 7 14.2582 7.0628 -0.3694 25 14 14.1924 7.8981 -3.0102 26 1 13.7232 9.2678 -3.3401 27 1 15.6746 7.8917 -2.9187 28 1 13.7576 6.9564 -4.0730 29 6 5.9630 4.2841 -0.1247 30 1 -0.3634 0.5139 -0.8899 31 1 -0.3634 -1.0277 0.0005 32 1 -0.3633 0.5138 0.8900 33 1 3.9558 0.7810 -0.8908 34 1 3.9564 0.7806 0.8891 35 1 3.6107 3.2356 0.8907 36 1 3.6100 3.2368 -0.8893 37 1 5.7989 1.1902 1.3824 38 1 5.6448 2.7878 2.1533 39 1 8.0220 1.8048 0.5078 40 1 7.9834 2.0103 2.2758 41 1 9.0553 3.9570 1.1622 42 1 7.5536 4.4309 1.9921 43 1 6.2616 6.2839 -1.6639 44 1 7.7701 7.1845 -1.9497 45 1 7.6286 5.4927 -2.4848 46 1 9.1205 8.1198 1.4262 47 1 9.8735 8.9673 0.0540 48 1 8.3443 8.0858 -0.1752 49 1 11.8293 7.5631 0.8837 50 1 11.8553 5.8663 0.3468 51 1 15.2207 7.1123 -0.4793 52 1 5.5563 4.8565 0.7089 53 1 5.5908 4.6948 -1.0632 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 ZINC000880038504.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 06:13:06 Heat of formation + Delta-G solvation = -126.741174 kcal Electronic energy + Delta-G solvation = -30566.682146 eV Core-core repulsion = 26438.223977 eV Total energy + Delta-G solvation = -4128.458168 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.76 seconds Orbital eigenvalues (eV) -40.85292 -39.96104 -38.39680 -36.95540 -35.30352 -34.66625 -33.23389 -32.47765 -30.46949 -29.89342 -28.04947 -27.72562 -25.93273 -25.00490 -24.80045 -23.24285 -21.86504 -21.46810 -20.59413 -19.79561 -18.27829 -17.88154 -17.01240 -16.92682 -16.62899 -16.45265 -16.00885 -15.15130 -15.14150 -14.80141 -14.34124 -14.19861 -14.13460 -14.04017 -13.75130 -13.50163 -13.25929 -13.02400 -12.86955 -12.69056 -12.55705 -12.23967 -12.12692 -11.99157 -11.76551 -11.71919 -11.58330 -11.37849 -11.32919 -11.20323 -11.14142 -11.01736 -10.87399 -10.81622 -10.69122 -10.54427 -10.34956 -10.19126 -10.12290 -9.60344 -8.75199 -8.40501 -8.10704 -7.59245 -6.01351 -4.05686 1.84866 2.34031 3.33968 3.38223 3.39639 3.43676 3.69944 4.18768 4.31693 4.47291 4.48282 4.56337 4.68780 4.75443 4.77656 4.84773 4.93368 5.05570 5.09205 5.16554 5.26658 5.29909 5.33052 5.35646 5.39116 5.47260 5.51618 5.52373 5.62962 5.64177 5.70773 5.80866 5.85281 5.90475 5.92064 5.95174 6.00781 6.04196 6.13983 6.20205 6.26712 6.35851 6.42718 7.00153 7.18695 7.23528 7.37590 7.45398 7.58447 7.95224 8.26641 8.46464 8.94075 9.16914 9.59248 11.06647 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.026187 B = 0.001959 C = 0.001937 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1068.993809 B =14287.540992 C =14452.467686 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.035 3.965 2 O -0.363 6.363 3 C 0.459 3.541 4 O -0.508 6.508 5 C -0.114 4.114 6 C -0.102 4.102 7 C -0.083 4.083 8 H 0.085 0.915 9 C -0.118 4.118 10 C -0.113 4.113 11 C 0.053 3.947 12 N -0.514 5.514 13 C 0.066 3.934 14 H 0.053 0.947 15 C -0.140 4.140 16 C 0.509 3.491 17 O -0.519 6.519 18 N -0.606 5.606 19 C 0.082 3.918 20 C 0.248 3.752 21 C -0.524 4.524 22 H 0.056 0.944 23 C 0.060 3.940 24 N -0.896 5.896 25 Si 0.898 3.102 26 H -0.277 1.277 27 H -0.287 1.287 28 H -0.276 1.276 29 C 0.060 3.940 30 H 0.062 0.938 31 H 0.101 0.899 32 H 0.062 0.938 33 H 0.108 0.892 34 H 0.108 0.892 35 H 0.071 0.929 36 H 0.074 0.926 37 H 0.064 0.936 38 H 0.058 0.942 39 H 0.074 0.926 40 H 0.065 0.935 41 H 0.086 0.914 42 H 0.026 0.974 43 H 0.060 0.940 44 H 0.066 0.934 45 H 0.073 0.927 46 H 0.042 0.958 47 H 0.073 0.927 48 H 0.058 0.942 49 H 0.031 0.969 50 H 0.041 0.959 51 H 0.263 0.737 52 H 0.031 0.969 53 H 0.080 0.920 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -25.665 -10.193 4.096 27.917 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 -0.059 4.059 2 O -0.279 6.279 3 C 0.302 3.698 4 O -0.396 6.396 5 C -0.151 4.151 6 C -0.140 4.140 7 C -0.102 4.102 8 H 0.103 0.897 9 C -0.156 4.156 10 C -0.151 4.151 11 C -0.075 4.075 12 N -0.239 5.239 13 C -0.046 4.046 14 H 0.071 0.929 15 C -0.198 4.198 16 C 0.294 3.706 17 O -0.394 6.394 18 N -0.339 5.339 19 C -0.062 4.062 20 C 0.129 3.871 21 C -0.563 4.563 22 H 0.075 0.925 23 C -0.141 4.141 24 N -0.535 5.535 25 Si 0.726 3.274 26 H -0.203 1.203 27 H -0.212 1.212 28 H -0.202 1.202 29 C -0.068 4.068 30 H 0.081 0.919 31 H 0.119 0.881 32 H 0.081 0.919 33 H 0.126 0.874 34 H 0.126 0.874 35 H 0.090 0.910 36 H 0.092 0.908 37 H 0.082 0.918 38 H 0.077 0.923 39 H 0.093 0.907 40 H 0.084 0.916 41 H 0.104 0.896 42 H 0.044 0.956 43 H 0.079 0.921 44 H 0.085 0.915 45 H 0.092 0.908 46 H 0.060 0.940 47 H 0.092 0.908 48 H 0.076 0.924 49 H 0.049 0.951 50 H 0.059 0.941 51 H 0.073 0.927 52 H 0.049 0.951 53 H 0.098 0.902 Dipole moment (debyes) X Y Z Total from point charges -25.149 -10.712 3.586 27.570 hybrid contribution -0.076 1.037 -0.169 1.054 sum -25.225 -9.675 3.417 27.232 Atomic orbital electron populations 1.23262 0.76376 1.03693 1.02568 1.86521 1.23476 1.33769 1.84171 1.24007 0.92497 0.81197 0.72058 1.90678 1.67371 1.36352 1.45153 1.21505 0.86756 1.00656 1.06227 1.21448 0.95352 0.93408 1.03819 1.21186 0.93235 0.96659 0.99128 0.89673 1.21724 0.96220 1.00598 0.97026 1.21534 0.95184 0.96282 1.02109 1.22154 1.01386 0.95221 0.88751 1.61622 1.08010 1.20050 1.34213 1.21661 0.94412 0.89742 0.98801 0.92920 1.21790 1.00242 1.01916 0.95846 1.20062 0.88381 0.83546 0.78597 1.90676 1.68536 1.34941 1.45212 1.48189 1.09601 1.10457 1.65674 1.21666 0.96280 0.89290 0.99007 1.19245 0.72275 0.98533 0.97062 1.21392 0.91544 1.45442 0.97887 0.92530 1.24933 0.96951 0.95377 0.96876 1.69921 1.03936 1.48675 1.30976 0.86563 0.77800 0.79002 0.84078 1.20310 1.21215 1.20156 1.22141 0.87635 0.95893 1.01112 0.91878 0.88102 0.91920 0.87357 0.87371 0.91031 0.90768 0.91774 0.92295 0.90701 0.91643 0.89589 0.95596 0.92065 0.91537 0.90806 0.93972 0.90846 0.92357 0.95110 0.94071 0.92721 0.95092 0.90207 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 13. 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 0.20 10.56 101.05 1.07 1.26 16 2 O -0.36 -2.95 10.57 -39.25 -0.41 -3.37 16 3 C 0.46 4.10 7.96 36.00 0.29 4.38 16 4 O -0.51 -5.99 15.73 -18.75 -0.29 -6.28 16 5 C -0.11 -0.75 5.57 -27.88 -0.16 -0.91 16 6 C -0.10 -0.80 3.97 -26.73 -0.11 -0.91 16 7 C -0.08 -0.76 2.35 -90.55 -0.21 -0.97 16 8 H 0.08 0.83 8.14 -51.93 -0.42 0.40 16 9 C -0.12 -1.05 4.98 -26.62 -0.13 -1.18 16 10 C -0.11 -1.31 6.09 -26.65 -0.16 -1.47 16 11 C 0.05 0.76 5.14 -3.83 -0.02 0.74 16 12 N -0.51 -7.47 4.27 -228.08 -0.97 -8.45 16 13 C 0.07 1.02 1.62 -68.87 -0.11 0.91 16 14 H 0.05 0.74 6.77 -51.93 -0.35 0.39 16 15 C -0.14 -1.92 8.44 37.16 0.31 -1.60 16 16 C 0.51 10.67 5.62 -10.99 -0.06 10.61 16 17 O -0.52 -13.21 15.27 5.56 0.08 -13.12 16 18 N -0.61 -12.96 2.86 -182.95 -0.52 -13.49 16 19 C 0.08 1.32 9.87 59.85 0.59 1.91 16 20 C 0.25 6.54 5.14 -5.19 -0.03 6.51 16 21 C -0.52 -15.01 9.39 -34.44 -0.32 -15.33 16 22 H 0.06 1.62 7.81 -52.49 -0.41 1.21 16 23 C 0.06 1.74 5.46 -17.82 -0.10 1.65 16 24 N -0.90 -26.79 13.29 55.43 0.74 -26.06 16 25 Si 0.90 22.09 29.54 -169.99 -5.02 17.07 16 26 H -0.28 -6.61 7.11 56.52 0.40 -6.21 16 27 H -0.29 -6.93 7.11 56.52 0.40 -6.52 16 28 H -0.28 -6.84 7.11 56.52 0.40 -6.44 16 29 C 0.06 0.66 4.46 -3.83 -0.02 0.65 16 30 H 0.06 0.36 8.13 -51.93 -0.42 -0.06 16 31 H 0.10 0.31 8.14 -51.93 -0.42 -0.12 16 32 H 0.06 0.35 8.13 -51.93 -0.42 -0.07 16 33 H 0.11 0.58 8.14 -51.93 -0.42 0.16 16 34 H 0.11 0.57 6.63 -51.93 -0.34 0.23 16 35 H 0.07 0.61 8.10 -51.93 -0.42 0.19 16 36 H 0.07 0.62 8.10 -51.93 -0.42 0.20 16 37 H 0.06 0.46 6.70 -51.93 -0.35 0.11 16 38 H 0.06 0.52 8.14 -51.93 -0.42 0.09 16 39 H 0.07 0.96 8.14 -51.93 -0.42 0.53 16 40 H 0.06 0.68 8.14 -51.93 -0.42 0.26 16 41 H 0.09 1.55 6.18 -51.93 -0.32 1.23 16 42 H 0.03 0.35 8.14 -51.93 -0.42 -0.07 16 43 H 0.06 0.66 6.58 -51.93 -0.34 0.31 16 44 H 0.07 0.91 7.22 -51.93 -0.37 0.53 16 45 H 0.07 1.12 8.14 -51.93 -0.42 0.70 16 46 H 0.04 0.59 8.14 -51.93 -0.42 0.17 16 47 H 0.07 1.21 8.11 -51.93 -0.42 0.79 16 48 H 0.06 0.78 5.40 -51.93 -0.28 0.50 16 49 H 0.03 0.82 8.07 -51.93 -0.42 0.40 16 50 H 0.04 1.22 7.50 -51.93 -0.39 0.83 16 51 H 0.26 7.45 8.31 -40.82 -0.34 7.11 16 52 H 0.03 0.33 8.14 -51.93 -0.42 -0.09 16 53 H 0.08 0.84 6.08 -51.93 -0.32 0.52 16 LS Contribution 414.70 15.07 6.25 6.25 Total: -1.00 -35.21 414.70 -8.69 -43.90 By element: Atomic # 1 Polarization: 6.66 SS G_CDS: -9.36 Total: -2.71 kcal Atomic # 6 Polarization: 5.42 SS G_CDS: 0.83 Total: 6.25 kcal Atomic # 7 Polarization: -47.23 SS G_CDS: -0.76 Total: -47.99 kcal Atomic # 8 Polarization: -22.15 SS G_CDS: -0.62 Total: -22.77 kcal Atomic # 14 Polarization: 22.09 SS G_CDS: -5.02 Total: 17.07 kcal Total LS contribution 6.25 Total: 6.25 kcal Total: -35.21 -8.69 -43.90 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. ZINC000880038504.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 -82.843 kcal (2) G-P(sol) polarization free energy of solvation -35.209 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -118.052 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.690 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.899 kcal (6) G-S(sol) free energy of system = (1) + (5) -126.741 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.77 seconds