Wall clock time and date at job start Sun Mar 7 2021 14:27:05 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= 0 * 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 1.45198 * 1 3 3 C 1.34224 * 117.00572 * 2 1 4 4 O 1.20835 * 119.99735 * 359.97438 * 3 2 1 5 5 C 1.50697 * 120.00487 * 180.02562 * 3 2 1 6 6 C 1.53004 * 109.47380 * 179.97438 * 5 3 2 7 7 H 1.09003 * 112.84824 * 316.19219 * 6 5 3 8 8 C 1.53777 * 113.61436 * 87.49523 * 6 5 3 9 9 C 1.53784 * 87.08099 * 139.98367 * 8 6 5 10 10 H 1.09003 * 113.61514 * 89.11453 * 9 8 6 11 11 N 1.46502 * 113.61516 * 220.02170 * 9 8 6 12 12 C 1.34777 * 119.99840 * 252.49355 * 11 9 8 13 13 O 1.21615 * 119.99758 * 359.97438 * 12 11 9 14 14 C 1.47377 * 120.00073 * 180.02562 * 12 11 9 15 15 C 1.36412 * 127.19400 * 179.70943 * 14 12 11 16 16 C 1.50702 * 125.79978 * 359.97438 * 15 14 12 17 17 O 1.42903 * 109.47066 * 90.00145 * 16 15 14 18 18 C 1.35904 * 117.00095 * 180.02562 * 17 16 15 19 19 C 1.38731 * 120.05212 * 359.72169 * 18 17 16 20 20 C 1.38142 * 119.94006 * 179.74392 * 19 18 17 21 21 C 1.38264 * 120.05918 * 0.50776 * 20 19 18 22 22 C 1.50699 * 119.94640 * 179.74349 * 21 20 19 23 23 O 1.42897 * 109.46969 * 245.02286 * 22 21 20 24 24 Si 1.86294 * 109.47140 * 5.02361 * 22 21 20 25 25 C 1.38268 * 120.10762 * 359.77134 * 21 20 19 26 26 C 1.38148 * 120.05773 * 359.97177 * 25 21 20 27 27 O 1.33653 * 108.39890 * 179.83385 * 15 14 12 28 28 C 1.34213 * 110.90546 * 0.45315 * 27 15 14 29 29 C 1.34179 * 109.12635 * 359.71729 * 28 27 15 30 30 C 1.53777 * 113.61705 * 184.99847 * 6 5 3 31 31 H 1.09002 * 109.47379 * 180.02562 * 1 2 3 32 32 H 1.09001 * 109.46782 * 60.00258 * 1 2 3 33 33 H 1.09004 * 109.47085 * 300.00378 * 1 2 3 34 34 H 1.09003 * 109.46714 * 299.99382 * 5 3 2 35 35 H 1.08995 * 109.47205 * 59.99484 * 5 3 2 36 36 H 1.08995 * 113.61971 * 254.53176 * 8 6 5 37 37 H 1.08999 * 113.61785 * 25.43862 * 8 6 5 38 38 H 0.97001 * 119.99823 * 72.50236 * 11 9 8 39 39 H 1.08998 * 109.46840 * 209.99781 * 16 15 14 40 40 H 1.08999 * 109.47098 * 330.00111 * 16 15 14 41 41 H 1.08000 * 120.03213 * 0.02562 * 19 18 17 42 42 H 1.08006 * 119.97053 * 180.22863 * 20 19 18 43 43 H 1.09002 * 109.46954 * 125.02857 * 22 21 20 44 44 H 0.96705 * 114.00226 * 60.00289 * 23 22 21 45 45 H 1.48506 * 110.00006 * 179.97438 * 24 22 21 46 46 H 1.48499 * 110.00165 * 301.31985 * 24 22 21 47 47 H 1.08000 * 119.96788 * 179.97438 * 25 21 20 48 48 H 1.07993 * 120.02620 * 179.97438 * 26 25 21 49 49 H 1.07998 * 125.43736 * 179.72583 * 28 27 15 50 50 H 1.07995 * 127.02433 * 179.97438 * 29 28 27 51 51 H 1.09003 * 113.61335 * 334.56657 * 30 6 5 52 52 H 1.09000 * 113.61639 * 105.38093 * 30 6 5 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 2.0615 1.1959 0.0000 4 8 1.4034 2.2093 -0.0005 5 6 3.5664 1.2747 -0.0006 6 6 4.0003 2.7420 -0.0011 7 1 3.4249 3.3532 -0.6964 8 6 4.1164 3.3505 1.4064 9 6 5.3819 4.0672 0.9065 10 1 5.1842 5.0419 0.4602 11 7 6.4656 4.1003 1.8917 12 6 6.7761 5.2551 2.5134 13 8 6.1569 6.2698 2.2561 14 6 7.8666 5.2886 3.5041 15 6 8.3052 6.3694 4.2115 16 6 7.7519 7.7680 4.1177 17 8 6.6956 7.9270 5.0671 18 6 6.0841 9.1398 5.1122 19 6 6.4960 10.1577 4.2644 20 6 5.8693 11.3879 4.3086 21 6 4.8392 11.6086 5.2041 22 6 4.1610 12.9535 5.2541 23 8 4.4122 13.5667 6.5202 24 14 4.8307 14.0376 3.8952 25 6 4.4306 10.5975 6.0542 26 6 5.0506 9.3638 6.0102 27 8 9.3071 5.9765 5.0041 28 6 9.5603 4.6683 4.8431 29 6 8.7133 4.1654 3.9320 30 6 5.5209 2.9346 -0.1245 31 1 -0.3634 -1.0277 0.0005 32 1 -0.3633 0.5138 -0.8900 33 1 -0.3633 0.5139 0.8900 34 1 3.9564 0.7805 0.8892 35 1 3.9557 0.7807 -0.8907 36 1 3.3010 4.0286 1.6576 37 1 4.3111 2.6139 2.1859 38 1 6.9597 3.2911 2.0965 39 1 8.5431 8.4868 4.3307 40 1 7.3661 7.9394 3.1128 41 1 7.3030 9.9870 3.5672 42 1 6.1871 12.1795 3.6461 43 1 3.0871 12.8240 5.1199 44 1 5.3497 13.7127 6.7074 45 1 4.1695 15.3667 3.9334 46 1 6.2993 14.1957 4.0487 47 1 3.6260 10.7725 6.7531 48 1 4.7314 8.5746 6.6747 49 1 10.3239 4.1096 5.3639 50 1 8.6640 3.1444 3.5837 51 1 6.0995 2.0843 0.2365 52 1 5.8394 3.2756 -1.1096 There are 74 doubly filled levels RHF calculation, no. of doubly occupied orbitals= 74 No. of singly occupied orbitals= 1 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=0 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 s_22_17321982_4549634.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Sun Mar 7 2021 14:27:05 Heat of formation + Delta-G solvation = -112.708630 kcal Electronic energy + Delta-G solvation = -36758.629447 eV Core-core repulsion = 31658.378654 eV Total energy + Delta-G solvation = -5100.250793 eV No. of doubly occupied orbitals = 74 and no. of open levels = 1 Molecular weight (most abundant/longest-lived isotopes) = 402.165 amu Computer time = 1.50 seconds Orbital eigenvalues (eV) -43.74671 -41.66180 -41.18245 -40.84054 -39.35911 -39.09038 -37.38623 -37.19155 -34.92532 -33.96155 -32.81289 -31.90330 -31.58321 -31.31835 -28.53571 -27.88475 -26.81339 -26.14833 -25.43888 -23.85113 -23.67067 -22.42446 -22.19020 -21.53926 -21.27838 -20.42792 -19.39625 -19.14694 -18.51867 -18.27330 -17.84240 -17.51614 -17.38773 -17.20642 -17.02491 -16.85861 -16.62138 -16.34766 -16.15402 -16.03526 -15.74270 -15.67676 -15.40461 -14.87805 -14.71918 -14.56445 -14.49287 -14.25562 -14.18264 -14.00900 -13.83448 -13.63554 -13.54429 -13.42217 -13.34510 -13.09272 -12.96788 -12.86345 -12.21295 -12.17751 -12.03970 -11.98049 -11.92897 -11.75837 -11.51428 -11.46172 -11.35278 -10.97496 -10.93917 -10.49992 -10.09028 -9.93760 -9.85861 -9.11809 -4.89656 0.03539 0.39337 0.41084 0.91639 1.24194 1.35891 1.48961 1.64081 1.71833 2.01278 2.13456 2.18912 2.53556 2.75560 3.28742 3.32893 3.36809 3.46940 3.58183 3.62431 3.68671 3.74650 3.76202 3.84749 3.85227 3.94095 3.97999 4.15166 4.17331 4.19666 4.24018 4.29070 4.30778 4.37100 4.40704 4.50997 4.53693 4.56476 4.60264 4.61261 4.68314 4.72895 4.76614 4.77991 4.92906 5.04220 5.04425 5.09112 5.21792 5.25305 5.36474 5.43048 5.52115 5.58747 5.78348 5.84313 6.38154 6.45699 6.48312 6.77316 7.18880 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 0.458 3.542 4 O -0.503 6.503 5 C -0.102 4.102 6 C -0.099 4.099 7 H 0.108 0.892 8 C -0.147 4.147 9 C 0.125 3.875 10 H 0.120 0.880 11 N -0.712 5.712 12 C 0.590 3.410 13 O -0.531 6.531 14 C -0.210 4.210 15 C 0.064 3.936 16 C 0.136 3.864 17 O -0.304 6.304 18 C 0.143 3.857 19 C -0.202 4.202 20 C -0.076 4.076 21 C -0.157 4.157 22 C -0.069 4.069 23 O -0.531 6.531 24 Si 0.684 3.316 25 C -0.051 4.051 26 C -0.148 4.148 27 O -0.165 6.165 28 C -0.015 4.015 29 C -0.196 4.196 30 C -0.139 4.139 31 H 0.102 0.898 32 H 0.064 0.936 33 H 0.063 0.937 34 H 0.107 0.893 35 H 0.110 0.890 36 H 0.078 0.922 37 H 0.085 0.915 38 H 0.401 0.599 39 H 0.083 0.917 40 H 0.117 0.883 41 H 0.132 0.868 42 H 0.130 0.870 43 H 0.117 0.883 44 H 0.375 0.625 45 H -0.258 1.258 46 H -0.261 1.261 47 H 0.133 0.867 48 H 0.133 0.867 49 H 0.214 0.786 50 H 0.162 0.838 51 H 0.090 0.910 52 H 0.082 0.918 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 4.041 -6.872 -2.910 8.486 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 -0.280 6.280 3 C 0.301 3.699 4 O -0.390 6.390 5 C -0.140 4.140 6 C -0.118 4.118 7 H 0.126 0.874 8 C -0.185 4.185 9 C 0.020 3.980 10 H 0.138 0.862 11 N -0.362 5.362 12 C 0.378 3.622 13 O -0.409 6.409 14 C -0.215 4.215 15 C 0.011 3.989 16 C 0.061 3.939 17 O -0.217 6.217 18 C 0.098 3.902 19 C -0.221 4.221 20 C -0.094 4.094 21 C -0.157 4.157 22 C -0.179 4.179 23 O -0.337 6.337 24 Si 0.585 3.415 25 C -0.069 4.069 26 C -0.167 4.167 27 O -0.061 6.061 28 C -0.082 4.082 29 C -0.215 4.215 30 C -0.178 4.178 31 H 0.121 0.879 32 H 0.082 0.918 33 H 0.082 0.918 34 H 0.125 0.875 35 H 0.128 0.872 36 H 0.097 0.903 37 H 0.104 0.896 38 H 0.236 0.764 39 H 0.101 0.899 40 H 0.134 0.866 41 H 0.150 0.850 42 H 0.147 0.853 43 H 0.135 0.865 44 H 0.223 0.777 45 H -0.183 1.183 46 H -0.186 1.186 47 H 0.151 0.849 48 H 0.151 0.849 49 H 0.231 0.769 50 H 0.179 0.821 51 H 0.109 0.891 52 H 0.100 0.900 Dipole moment (debyes) X Y Z Total from point charges 3.252 -5.108 -2.961 6.740 hybrid contribution 0.762 -0.736 0.986 1.447 sum 4.014 -5.844 -1.975 7.360 Atomic orbital electron populations 1.23300 0.75941 1.03920 1.02721 1.86501 1.23792 1.33564 1.84100 1.23818 0.92302 0.81397 0.72425 1.90702 1.67225 1.36289 1.44746 1.21405 0.87624 0.98895 1.06058 1.22253 0.96132 0.94160 0.99256 0.87364 1.23565 0.98409 1.00201 0.96374 1.22510 0.86355 0.99994 0.89117 0.86236 1.45736 1.36803 1.11221 1.42436 1.17215 0.81735 0.83566 0.79734 1.90804 1.52363 1.33360 1.64404 1.21241 1.01913 0.93771 1.04571 1.21961 0.89469 0.95386 0.92058 1.21114 0.89087 0.88653 0.95055 1.86089 1.47897 1.30879 1.56876 1.18960 0.92651 0.83677 0.94921 1.21174 1.04157 0.94032 1.02703 1.20821 0.94750 0.96626 0.97162 1.20154 0.99183 0.96968 0.99407 1.24938 1.04900 0.94281 0.93824 1.86597 1.30497 1.81569 1.35063 0.94963 0.79776 0.80568 0.86156 1.20828 0.98152 0.90974 0.96975 1.20488 0.96971 0.98546 1.00695 1.83800 1.43801 1.26274 1.52179 1.24060 1.02300 0.80646 1.01148 1.22886 0.97836 0.99652 1.01153 1.23430 0.95740 0.98504 1.00085 0.87929 0.91752 0.91778 0.87458 0.87188 0.90302 0.89633 0.76379 0.89919 0.86562 0.85045 0.85312 0.86504 0.77737 1.18276 1.18616 0.84902 0.84916 0.76945 0.82089 0.89135 0.89973 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 -0.02 10.56 101.05 1.07 1.04 16 2 O -0.36 -0.38 10.56 -39.24 -0.41 -0.79 16 3 C 0.46 0.55 7.96 36.00 0.29 0.84 16 4 O -0.50 -2.18 15.51 -18.76 -0.29 -2.47 16 5 C -0.10 0.25 5.65 -27.88 -0.16 0.09 16 6 C -0.10 0.17 3.15 -89.81 -0.28 -0.11 16 7 H 0.11 -0.03 7.68 -51.93 -0.40 -0.43 16 8 C -0.15 0.08 7.43 -25.92 -0.19 -0.11 16 9 C 0.12 -0.10 4.24 -67.11 -0.28 -0.38 16 10 H 0.12 0.12 7.46 -51.93 -0.39 -0.26 16 11 N -0.71 0.53 5.35 -54.10 -0.29 0.24 16 12 C 0.59 1.42 7.81 -12.54 -0.10 1.32 16 13 O -0.53 -2.94 14.45 5.26 0.08 -2.86 16 14 C -0.21 -0.31 6.31 -103.28 -0.65 -0.96 16 15 C 0.06 0.13 7.00 -34.97 -0.24 -0.11 16 16 C 0.14 0.24 4.74 36.01 0.17 0.41 16 17 O -0.30 -1.19 10.12 -19.44 -0.20 -1.38 16 18 C 0.14 0.46 6.69 -39.22 -0.26 0.20 16 19 C -0.20 -0.35 9.04 -39.43 -0.36 -0.71 16 20 C -0.08 -0.08 8.66 -39.61 -0.34 -0.43 16 21 C -0.16 -0.24 5.35 -104.60 -0.56 -0.79 16 22 C -0.07 -0.06 2.80 36.01 0.10 0.04 16 23 O -0.53 -1.14 12.83 -35.23 -0.45 -1.59 16 24 Si 0.68 -0.01 29.88 -169.99 -5.08 -5.09 16 25 C -0.05 -0.10 9.68 -39.60 -0.38 -0.49 16 26 C -0.15 -0.41 9.99 -39.43 -0.39 -0.81 16 27 O -0.17 -0.21 10.52 7.65 0.08 -0.13 16 28 C -0.01 0.02 12.03 29.30 0.35 0.38 16 29 C -0.20 0.29 10.60 -37.45 -0.40 -0.10 16 30 C -0.14 0.45 7.39 -25.92 -0.19 0.26 16 31 H 0.10 -0.30 8.14 -51.93 -0.42 -0.73 16 32 H 0.06 -0.03 8.13 -51.93 -0.42 -0.46 16 33 H 0.06 -0.03 8.13 -51.93 -0.42 -0.45 16 34 H 0.11 -0.43 7.85 -51.93 -0.41 -0.84 16 35 H 0.11 -0.46 8.14 -51.93 -0.42 -0.88 16 36 H 0.08 0.13 8.14 -51.93 -0.42 -0.29 16 37 H 0.09 -0.12 7.90 -51.93 -0.41 -0.53 16 38 H 0.40 -1.38 7.90 -40.82 -0.32 -1.71 16 39 H 0.08 -0.03 7.65 -51.93 -0.40 -0.43 16 40 H 0.12 0.22 6.02 -51.93 -0.31 -0.09 16 41 H 0.13 -0.03 6.30 -52.49 -0.33 -0.36 16 42 H 0.13 -0.09 4.83 -52.48 -0.25 -0.34 16 43 H 0.12 0.02 7.96 -51.93 -0.41 -0.40 16 44 H 0.38 -0.24 8.70 45.56 0.40 0.16 16 45 H -0.26 -0.82 7.11 56.52 0.40 -0.42 16 46 H -0.26 -0.44 7.00 56.52 0.40 -0.05 16 47 H 0.13 0.13 8.06 -52.49 -0.42 -0.30 16 48 H 0.13 0.26 8.06 -52.49 -0.42 -0.16 16 49 H 0.21 -1.17 8.06 -52.49 -0.42 -1.60 16 50 H 0.16 -0.74 7.74 -52.49 -0.41 -1.15 16 51 H 0.09 -0.44 8.08 -51.93 -0.42 -0.86 16 52 H 0.08 -0.28 8.14 -51.93 -0.42 -0.70 16 LS Contribution 439.48 15.07 6.62 6.62 Total: 0.00 -11.30 439.48 -9.84 -21.14 By element: Atomic # 1 Polarization: -6.21 SS G_CDS: -7.07 Total: -13.28 kcal Atomic # 6 Polarization: 2.41 SS G_CDS: -2.82 Total: -0.41 kcal Atomic # 7 Polarization: 0.53 SS G_CDS: -0.29 Total: 0.24 kcal Atomic # 8 Polarization: -8.03 SS G_CDS: -1.20 Total: -9.23 kcal Atomic # 14 Polarization: -0.01 SS G_CDS: -5.08 Total: -5.09 kcal Total LS contribution 6.62 Total: 6.62 kcal Total: -11.30 -9.84 -21.14 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. s_22_17321982_4549634.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 -91.568 kcal (2) G-P(sol) polarization free energy of solvation -11.304 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -102.872 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.836 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -21.141 kcal (6) G-S(sol) free energy of system = (1) + (5) -112.709 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.50 seconds