Wall clock time and date at job start Sat Apr 11 2020 06:10:24 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 1.52994 * 1 3 3 C 1.52998 * 109.47275 * 2 1 4 4 H 1.09000 * 109.47019 * 305.00637 * 3 2 1 5 5 C 1.52999 * 109.47159 * 65.00452 * 3 2 1 6 6 C 1.52999 * 109.47270 * 185.00214 * 3 2 1 7 7 H 1.09004 * 109.46958 * 184.99762 * 6 3 2 8 8 N 1.46497 * 109.47357 * 305.00452 * 6 3 2 9 9 C 1.34780 * 119.99566 * 275.00168 * 8 6 3 10 10 O 1.21280 * 120.00423 * 359.97438 * 9 8 6 11 11 C 1.50701 * 119.99795 * 180.02562 * 9 8 6 12 12 N 1.46901 * 109.46921 * 179.97438 * 11 9 8 13 13 C 1.46839 * 111.00222 * 294.20814 * 12 11 9 14 14 C 1.53034 * 109.52552 * 174.16216 * 13 12 11 15 15 C 1.53123 * 109.28182 * 59.17780 * 14 13 12 16 16 C 1.50696 * 109.57716 * 182.41084 * 15 14 13 17 17 H 1.07997 * 119.99878 * 119.72167 * 16 15 14 18 18 C 1.37871 * 120.00268 * 299.71257 * 16 15 14 19 19 N 1.31519 * 119.99776 * 0.02562 * 18 16 15 20 20 Si 1.86792 * 120.00297 * 180.02562 * 18 16 15 21 21 H 1.48498 * 109.47155 * 0.02562 * 20 18 16 22 22 H 1.48502 * 109.47555 * 120.00183 * 20 18 16 23 23 H 1.48508 * 109.47373 * 240.00252 * 20 18 16 24 24 C 1.53120 * 109.16070 * 302.35293 * 15 14 13 25 25 C 1.46849 * 110.99649 * 169.99608 * 12 11 9 26 26 C 1.50705 * 109.46944 * 65.00389 * 6 3 2 27 27 O 1.20823 * 119.99666 * 240.00110 * 26 6 3 28 28 O 1.34222 * 120.00177 * 59.99766 * 26 6 3 29 29 C 1.45203 * 116.99935 * 179.97438 * 28 26 6 30 30 H 1.09000 * 109.47568 * 59.99696 * 1 2 3 31 31 H 1.09002 * 109.47115 * 180.02562 * 1 2 3 32 32 H 1.09001 * 109.46870 * 299.99555 * 1 2 3 33 33 H 1.09001 * 109.46870 * 240.00445 * 2 1 3 34 34 H 1.09000 * 109.47568 * 120.00304 * 2 1 3 35 35 H 1.09005 * 109.47210 * 300.00256 * 5 3 2 36 36 H 1.08998 * 109.47399 * 59.99514 * 5 3 2 37 37 H 1.08994 * 109.47552 * 180.02562 * 5 3 2 38 38 H 0.96995 * 120.00423 * 94.99474 * 8 6 3 39 39 H 1.09002 * 109.47060 * 299.99722 * 11 9 8 40 40 H 1.09001 * 109.47380 * 59.99809 * 11 9 8 41 41 H 1.09006 * 109.46266 * 294.17473 * 13 12 11 42 42 H 1.09002 * 109.46276 * 54.14664 * 13 12 11 43 43 H 1.09006 * 109.50444 * 299.24199 * 14 13 12 44 44 H 1.09003 * 109.50687 * 179.12283 * 14 13 12 45 45 H 1.09005 * 109.51783 * 62.25186 * 15 14 13 46 46 H 0.97006 * 120.00096 * 179.97438 * 19 18 16 47 47 H 1.09005 * 109.50142 * 297.71204 * 24 15 14 48 48 H 1.08993 * 109.53791 * 177.61458 * 24 15 14 49 49 H 1.08991 * 109.46839 * 305.85721 * 25 12 11 50 50 H 1.09005 * 109.46224 * 65.84006 * 25 12 11 51 51 H 1.09000 * 109.46743 * 60.00573 * 29 28 26 52 52 H 1.09001 * 109.47152 * 179.97438 * 29 28 26 53 53 H 1.08991 * 109.47212 * 300.00163 * 29 28 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 6 1.5299 0.0000 0.0000 3 6 2.0400 1.4425 0.0000 4 1 1.6053 1.9815 -0.8417 5 6 1.6353 2.1265 1.3074 6 6 3.5648 1.4443 -0.1258 7 1 3.9355 2.4655 -0.0367 8 7 4.1436 0.6200 0.9381 9 6 4.3724 1.1532 2.1546 10 8 4.0996 2.3155 2.3684 11 6 4.9683 0.3055 3.2488 12 7 5.1178 1.1127 4.4670 13 6 6.1036 2.1833 4.2713 14 6 6.1270 3.0888 5.5048 15 6 6.4892 2.2551 6.7371 16 6 6.4564 3.1283 7.9649 17 1 5.7802 2.8965 8.7745 18 6 7.2897 4.2230 8.0548 19 7 8.1129 4.5055 7.0687 20 14 7.2495 5.3050 9.5769 21 1 6.2449 4.7759 10.5339 22 1 8.5892 5.3080 10.2177 23 1 6.8830 6.6910 9.1896 24 6 5.4751 1.1182 6.8905 25 6 5.4705 0.2699 5.6167 26 6 3.9588 0.8822 -1.4674 27 8 4.6519 -0.1056 -1.5285 28 8 3.5397 1.4788 -2.5943 29 6 3.9582 0.8829 -3.8506 30 1 -0.3634 0.5139 -0.8899 31 1 -0.3633 -1.0277 0.0005 32 1 -0.3633 0.5138 0.8900 33 1 1.8932 -0.5138 -0.8900 34 1 1.8934 -0.5139 0.8899 35 1 0.5490 2.1252 1.3971 36 1 2.0699 1.5874 2.1492 37 1 1.9983 3.1542 1.3073 38 1 4.3620 -0.3094 0.7670 39 1 4.3116 -0.5405 3.4514 40 1 5.9455 -0.0604 2.9336 41 1 7.0908 1.7455 4.1234 42 1 5.8320 2.7712 3.3944 43 1 5.1438 3.5378 5.6455 44 1 6.8699 3.8743 5.3657 45 1 7.4885 1.8377 6.6136 46 1 8.6989 5.2760 7.1317 47 1 4.4815 1.5362 7.0528 48 1 5.7514 0.4956 7.7414 49 1 4.7392 -0.5320 5.7171 50 1 6.4607 -0.1588 5.4626 51 1 3.5900 -0.1415 -3.9072 52 1 3.5516 1.4610 -4.6803 53 1 5.0467 0.8814 -3.9073 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 ZINC000541951321.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 06:10:24 Heat of formation + Delta-G solvation = -126.950102 kcal Electronic energy + Delta-G solvation = -31365.446784 eV Core-core repulsion = 27236.979556 eV Total energy + Delta-G solvation = -4128.467228 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.69 seconds Orbital eigenvalues (eV) -41.31372 -39.87166 -38.04419 -36.97559 -36.61787 -33.83809 -33.78461 -31.47312 -30.49666 -29.67934 -28.91736 -27.79947 -26.63048 -24.68712 -24.07627 -22.03362 -21.80418 -21.54692 -20.69983 -19.73476 -18.53751 -18.07552 -17.55098 -16.97122 -16.53164 -16.29402 -15.88225 -15.62175 -15.06923 -14.75117 -14.50257 -14.35477 -14.10706 -14.06204 -13.75030 -13.34069 -13.11083 -12.79414 -12.78460 -12.70812 -12.38380 -12.33027 -12.18592 -12.06750 -11.85796 -11.51814 -11.38060 -11.30989 -11.24157 -11.06834 -10.90910 -10.78669 -10.68612 -10.62555 -10.45788 -10.13768 -9.90304 -9.68534 -9.32795 -9.17568 -8.89462 -8.55055 -8.21256 -7.72737 -5.89830 -3.94770 1.73859 2.05714 2.73113 3.08222 3.35454 3.43343 3.47488 4.19968 4.36685 4.46554 4.51862 4.56218 4.69320 4.73518 4.78258 4.84061 5.10435 5.14167 5.22170 5.25863 5.35066 5.39310 5.40393 5.43776 5.47279 5.73552 5.74966 5.78280 5.85007 5.89699 5.91988 5.97040 6.06756 6.15852 6.22941 6.28896 6.41075 6.42545 6.70436 6.79921 6.92592 7.12210 7.22923 7.25507 7.35190 7.54318 7.67608 7.74644 7.90824 8.14808 8.25754 8.29106 8.56833 9.09078 9.69196 11.16394 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.018500 B = 0.002376 C = 0.002312 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1513.182367 B =11783.228589 C =12107.960034 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 -0.120 4.120 3 C -0.096 4.096 4 H 0.089 0.911 5 C -0.141 4.141 6 C 0.162 3.838 7 H 0.127 0.873 8 N -0.724 5.724 9 C 0.519 3.481 10 O -0.499 6.499 11 C 0.037 3.963 12 N -0.517 5.517 13 C 0.053 3.947 14 C -0.099 4.099 15 C 0.046 3.954 16 C -0.508 4.508 17 H 0.054 0.946 18 C 0.060 3.940 19 N -0.892 5.892 20 Si 0.889 3.111 21 H -0.274 1.274 22 H -0.286 1.286 23 H -0.285 1.285 24 C -0.105 4.105 25 C 0.061 3.939 26 C 0.463 3.537 27 O -0.503 6.503 28 O -0.352 6.352 29 C 0.035 3.965 30 H 0.053 0.947 31 H 0.053 0.947 32 H 0.061 0.939 33 H 0.053 0.947 34 H 0.068 0.932 35 H 0.054 0.946 36 H 0.066 0.934 37 H 0.065 0.935 38 H 0.407 0.593 39 H 0.098 0.902 40 H 0.058 0.942 41 H 0.015 0.985 42 H 0.074 0.926 43 H 0.044 0.956 44 H 0.091 0.909 45 H 0.019 0.981 46 H 0.258 0.742 47 H 0.058 0.942 48 H 0.050 0.950 49 H 0.058 0.942 50 H 0.025 0.975 51 H 0.064 0.936 52 H 0.104 0.896 53 H 0.064 0.936 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -12.090 -10.731 -21.492 26.893 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 -0.208 4.208 2 C -0.158 4.158 3 C -0.116 4.116 4 H 0.107 0.893 5 C -0.198 4.198 6 C 0.055 3.945 7 H 0.145 0.855 8 N -0.382 5.382 9 C 0.306 3.694 10 O -0.371 6.371 11 C -0.094 4.094 12 N -0.242 5.242 13 C -0.074 4.074 14 C -0.138 4.138 15 C 0.027 3.973 16 C -0.546 4.546 17 H 0.073 0.927 18 C -0.141 4.141 19 N -0.531 5.531 20 Si 0.717 3.283 21 H -0.199 1.199 22 H -0.212 1.212 23 H -0.211 1.211 24 C -0.143 4.143 25 C -0.066 4.066 26 C 0.305 3.695 27 O -0.390 6.390 28 O -0.268 6.268 29 C -0.059 4.059 30 H 0.072 0.928 31 H 0.072 0.928 32 H 0.080 0.920 33 H 0.071 0.929 34 H 0.087 0.913 35 H 0.073 0.927 36 H 0.085 0.915 37 H 0.084 0.916 38 H 0.243 0.757 39 H 0.116 0.884 40 H 0.076 0.924 41 H 0.033 0.967 42 H 0.092 0.908 43 H 0.063 0.937 44 H 0.109 0.891 45 H 0.037 0.963 46 H 0.068 0.932 47 H 0.076 0.924 48 H 0.069 0.931 49 H 0.076 0.924 50 H 0.043 0.957 51 H 0.082 0.918 52 H 0.122 0.878 53 H 0.083 0.917 Dipole moment (debyes) X Y Z Total from point charges -12.375 -9.812 -21.309 26.523 hybrid contribution 1.132 -0.425 0.179 1.222 sum -11.243 -10.236 -21.130 26.032 Atomic orbital electron populations 1.21786 0.95247 1.01622 1.02172 1.21586 0.96598 0.95743 1.01882 1.21612 0.91329 0.97560 1.01057 0.89292 1.21919 1.00628 1.01421 0.95842 1.20445 0.95415 0.97419 0.81248 0.85533 1.45834 1.66493 1.15265 1.10590 1.20716 0.77831 0.88672 0.82223 1.90739 1.48871 1.16852 1.80627 1.21903 1.00350 0.96032 0.91144 1.61767 1.49868 1.11524 1.01063 1.22440 0.90368 0.92862 1.01701 1.21597 1.01395 0.98476 0.92293 1.18716 0.93026 0.91546 0.93965 1.21240 1.20704 1.10310 1.02367 0.92734 1.24971 0.95425 0.97579 0.96121 1.69899 1.23896 1.28014 1.31297 0.86588 0.77638 0.80591 0.83466 1.19857 1.21230 1.21098 1.21668 1.01460 0.97793 0.93385 1.22156 0.97612 0.94975 0.91860 1.23785 0.76731 0.81912 0.87052 1.90669 1.35330 1.25359 1.87666 1.86501 1.69711 1.55388 1.15181 1.23323 1.01147 0.99319 0.82080 0.92770 0.92826 0.92025 0.92856 0.91297 0.92701 0.91505 0.91611 0.75728 0.88435 0.92447 0.96661 0.90791 0.93687 0.89127 0.96279 0.93231 0.92371 0.93115 0.92380 0.95703 0.91765 0.87796 0.91697 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 -0.15 -1.09 9.67 37.15 0.36 -0.73 16 2 C -0.12 -0.98 4.99 -26.74 -0.13 -1.11 16 3 C -0.10 -0.86 2.18 -90.62 -0.20 -1.05 16 4 H 0.09 0.71 7.99 -51.93 -0.42 0.30 16 5 C -0.14 -1.53 7.55 37.16 0.28 -1.25 16 6 C 0.16 1.63 2.47 -69.08 -0.17 1.46 16 7 H 0.13 1.40 7.58 -51.93 -0.39 1.01 16 8 N -0.72 -7.72 4.03 -54.93 -0.22 -7.94 16 9 C 0.52 7.11 6.07 -10.98 -0.07 7.04 16 10 O -0.50 -8.54 11.47 5.56 0.06 -8.47 16 11 C 0.04 0.51 5.45 -4.97 -0.03 0.48 16 12 N -0.52 -9.36 4.40 -236.11 -1.04 -10.39 16 13 C 0.05 1.11 5.10 -3.84 -0.02 1.09 16 14 C -0.10 -2.47 5.12 -26.65 -0.14 -2.61 16 15 C 0.05 1.17 2.16 -91.65 -0.20 0.97 16 16 C -0.51 -14.26 8.56 -34.44 -0.29 -14.56 16 17 H 0.05 1.52 7.74 -52.49 -0.41 1.11 16 18 C 0.06 1.69 5.31 -17.82 -0.09 1.59 16 19 N -0.89 -26.03 11.37 55.43 0.63 -25.40 16 20 Si 0.89 21.78 29.54 -169.99 -5.02 16.76 16 21 H -0.27 -6.61 7.11 56.52 0.40 -6.21 16 22 H -0.29 -6.95 7.11 56.52 0.40 -6.55 16 23 H -0.28 -6.96 7.11 56.52 0.40 -6.56 16 24 C -0.11 -2.24 5.32 -26.65 -0.14 -2.38 16 25 C 0.06 1.09 5.46 -3.83 -0.02 1.07 16 26 C 0.46 4.67 6.22 36.01 0.22 4.90 16 27 O -0.50 -5.99 15.59 -18.75 -0.29 -6.28 16 28 O -0.35 -3.09 10.37 -39.24 -0.41 -3.49 16 29 C 0.03 0.21 10.56 101.05 1.07 1.28 16 30 H 0.05 0.36 8.14 -51.93 -0.42 -0.06 16 31 H 0.05 0.36 8.14 -51.93 -0.42 -0.07 16 32 H 0.06 0.47 6.57 -51.93 -0.34 0.12 16 33 H 0.05 0.44 7.23 -51.93 -0.38 0.06 16 34 H 0.07 0.60 7.65 -51.93 -0.40 0.20 16 35 H 0.05 0.52 6.57 -51.93 -0.34 0.18 16 36 H 0.07 0.87 5.65 -51.93 -0.29 0.57 16 37 H 0.06 0.80 7.85 -51.93 -0.41 0.40 16 38 H 0.41 3.80 7.79 -40.82 -0.32 3.48 16 39 H 0.10 1.08 7.99 -51.93 -0.41 0.66 16 40 H 0.06 0.73 8.12 -51.93 -0.42 0.31 16 41 H 0.02 0.32 8.14 -51.93 -0.42 -0.10 16 42 H 0.07 1.56 5.78 -51.93 -0.30 1.26 16 43 H 0.04 1.17 8.14 -51.93 -0.42 0.75 16 44 H 0.09 2.50 6.17 -51.93 -0.32 2.18 16 45 H 0.02 0.53 8.14 -51.93 -0.42 0.11 16 46 H 0.26 7.18 8.31 -40.82 -0.34 6.84 16 47 H 0.06 1.27 8.14 -51.93 -0.42 0.85 16 48 H 0.05 1.03 8.14 -51.93 -0.42 0.61 16 49 H 0.06 0.87 8.01 -51.93 -0.42 0.46 16 50 H 0.02 0.44 8.14 -51.93 -0.42 0.02 16 51 H 0.06 0.37 8.13 -51.93 -0.42 -0.06 16 52 H 0.10 0.35 8.14 -51.93 -0.42 -0.07 16 53 H 0.06 0.40 8.13 -51.93 -0.42 -0.02 16 LS Contribution 406.83 15.07 6.13 6.13 Total: -1.00 -32.06 406.83 -9.07 -41.13 By element: Atomic # 1 Polarization: 11.12 SS G_CDS: -9.35 Total: 1.77 kcal Atomic # 6 Polarization: -4.23 SS G_CDS: 0.43 Total: -3.80 kcal Atomic # 7 Polarization: -43.11 SS G_CDS: -0.63 Total: -43.74 kcal Atomic # 8 Polarization: -17.61 SS G_CDS: -0.64 Total: -18.25 kcal Atomic # 14 Polarization: 21.78 SS G_CDS: -5.02 Total: 16.76 kcal Total LS contribution 6.13 Total: 6.13 kcal Total: -32.06 -9.07 -41.13 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. ZINC000541951321.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 -85.820 kcal (2) G-P(sol) polarization free energy of solvation -32.058 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -117.878 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.072 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -41.130 kcal (6) G-S(sol) free energy of system = (1) + (5) -126.950 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.69 seconds