Wall clock time and date at job start Thu Mar 4 2021 13:45:01 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 * SM5.42R - SM5.42R CALCULATIONS WILL BE PERFORMED * - CHARGE MODEL 2 WILL BE USED (CM2A) * - THE SOLVENT IS WATER ******************************************************************************* 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 1.53002 * 1 3 3 C 1.53000 * 109.47002 * 2 1 4 4 C 1.52998 * 109.47057 * 239.99685 * 2 1 3 5 5 Si 1.86305 * 109.46688 * 119.99546 * 2 1 3 6 6 C 1.86295 * 109.47222 * 300.00023 * 5 2 1 7 7 C 1.86305 * 109.46776 * 179.97438 * 5 2 1 8 8 O 1.63095 * 109.47157 * 60.00314 * 5 2 1 9 9 C 1.42895 * 114.00218 * 179.97438 * 8 5 2 10 10 C 1.53499 * 114.20819 * 209.99898 * 9 8 5 11 11 N 1.47074 * 87.98430 * 220.34287 * 10 9 8 12 12 C 1.34769 * 136.05569 * 207.08076 * 11 10 9 13 13 O 1.21594 * 120.00465 * 5.61697 * 12 11 10 14 14 C 1.47580 * 120.00057 * 185.61152 * 12 11 10 15 15 C 1.36500 * 120.01260 * 186.57676 * 14 12 11 16 16 N 1.35936 * 120.50655 * 179.76988 * 15 14 12 17 17 C 1.36999 * 132.41486 * 179.63585 * 16 15 14 18 18 C 1.50710 * 126.42519 * 0.69011 * 17 16 15 19 19 O 1.42901 * 109.47070 * 29.70697 * 18 17 16 20 20 Si 1.86302 * 109.47026 * 149.70885 * 18 17 16 21 21 H 1.48500 * 109.46861 * 59.99942 * 20 18 17 22 22 H 1.48492 * 109.47375 * 299.99961 * 20 18 17 23 23 H 1.48500 * 109.47017 * 179.97438 * 20 18 17 24 24 C 1.35007 * 107.14591 * 180.42225 * 17 16 15 25 25 N 1.33580 * 108.65424 * 0.22922 * 24 17 16 26 26 C 1.32412 * 109.22410 * 359.97438 * 25 24 17 27 27 C 1.41250 * 132.11596 * 180.02562 * 26 25 24 28 28 Br 1.89103 * 120.25416 * 359.97034 * 27 26 25 29 29 C 1.35709 * 119.49115 * 179.97438 * 27 26 25 30 30 C 1.47069 * 87.88615 * 27.34159 * 11 10 9 31 31 H 1.09001 * 109.47299 * 300.00636 * 1 2 3 32 32 H 1.09005 * 109.46893 * 60.00254 * 1 2 3 33 33 H 1.08994 * 109.47218 * 180.02562 * 1 2 3 34 34 H 1.09007 * 109.46565 * 179.97438 * 3 2 1 35 35 H 1.09005 * 109.47089 * 299.99626 * 3 2 1 36 36 H 1.08995 * 109.47914 * 59.99857 * 3 2 1 37 37 H 1.08999 * 109.47079 * 299.99716 * 4 2 1 38 38 H 1.08995 * 109.47329 * 60.00189 * 4 2 1 39 39 H 1.08998 * 109.47086 * 180.02562 * 4 2 1 40 40 H 1.08995 * 109.47066 * 180.02562 * 6 5 2 41 41 H 1.09005 * 109.47140 * 299.99573 * 6 5 2 42 42 H 1.08998 * 109.47337 * 59.99821 * 6 5 2 43 43 H 1.09002 * 109.47187 * 300.00436 * 7 5 2 44 44 H 1.08999 * 109.46768 * 59.99992 * 7 5 2 45 45 H 1.08995 * 109.46985 * 180.02562 * 7 5 2 46 46 H 1.09000 * 113.41119 * 343.20187 * 9 8 5 47 47 H 1.08994 * 113.46562 * 105.56485 * 10 9 8 48 48 H 1.08996 * 113.51710 * 335.13003 * 10 9 8 49 49 H 1.08001 * 119.74101 * 0.02562 * 15 14 12 50 50 H 1.09000 * 109.46487 * 269.70901 * 18 17 16 51 51 H 0.96703 * 113.99284 * 60.00171 * 19 18 17 52 52 H 1.08005 * 125.67202 * 180.20843 * 24 17 16 53 53 H 1.07995 * 120.23316 * 180.02562 * 29 27 26 54 54 H 1.09001 * 113.46810 * 87.43149 * 30 11 10 55 55 H 1.08996 * 113.47094 * 217.87732 * 30 11 10 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 6 2.0400 1.4425 0.0000 4 6 2.0400 -0.7213 -1.2492 5 14 2.1509 -0.8782 1.5213 6 6 1.5299 0.0002 3.0423 7 6 4.0140 -0.8788 1.5209 8 8 1.6073 -2.4158 1.5213 9 6 2.0293 -3.1815 2.6516 10 6 2.1847 -4.6828 2.3723 11 7 1.5824 -4.9374 3.6897 12 6 1.6440 -5.9185 4.6116 13 8 2.4193 -6.8436 4.4642 14 6 0.7706 -5.8701 5.8002 15 6 0.9249 -6.7879 6.7987 16 7 0.1291 -6.7498 7.9001 17 6 0.0655 -7.5338 9.0218 18 6 0.9437 -8.7172 9.3374 19 8 2.2260 -8.5331 8.7342 20 14 1.1418 -8.8687 11.1836 21 1 -0.1908 -9.0600 11.8103 22 1 1.7670 -7.6321 11.7175 23 1 2.0066 -10.0351 11.4946 24 6 -0.9275 -7.0437 9.7941 25 7 -1.4707 -5.9920 9.1752 26 6 -0.8488 -5.7950 8.0230 27 6 -1.0264 -4.8345 7.0027 28 35 -2.3669 -3.5104 7.1636 29 6 -0.2278 -4.8692 5.9060 30 6 0.8781 -3.6533 3.5552 31 1 -0.3634 0.5139 0.8899 32 1 -0.3633 0.5138 -0.8901 33 1 -0.3633 -1.0276 0.0005 34 1 3.1301 1.4424 0.0005 35 1 1.6767 1.9563 -0.8901 36 1 1.6767 1.9564 0.8899 37 1 1.6767 -1.7490 -1.2491 38 1 1.6767 -0.2076 -2.1392 39 1 3.1300 -0.7217 -1.2490 40 1 1.8935 -0.5133 3.9323 41 1 1.8933 1.0278 3.0423 42 1 0.4399 0.0003 3.0422 43 1 4.3769 -1.3930 0.6309 44 1 4.3776 0.1487 1.5206 45 1 4.3772 -1.3930 2.4107 46 1 2.8685 -2.7372 3.1868 47 1 3.2233 -5.0056 2.3002 48 1 1.5750 -5.0359 1.5407 49 1 1.6879 -7.5477 6.7148 50 1 0.4847 -9.6249 8.9455 51 1 2.6931 -7.7423 9.0369 52 1 -1.2322 -7.4369 10.7528 53 1 -0.3529 -4.1405 5.1190 54 1 -0.0765 -3.7342 3.0353 55 1 0.8035 -3.0991 4.4908 RHF calculation, no. of doubly occupied orbitals= 74 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). Br: (AM1): M.J.S. DEWAR AND E. G. ZOEBISCH, THEOCHEM, 180, 1 (1988). 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=WATER m_22_18362370_12335884.mol2 55 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Thu Mar 4 2021 13:45:01 Heat of formation + Delta-G solvation = -8.218732 kcal Electronic energy + Delta-G solvation = -37213.343857 eV Core-core repulsion = 32423.708778 eV Total energy + Delta-G solvation = -4789.635079 eV No. of doubly occupied orbitals = 74 Molecular weight (most abundant/longest-lived isotopes) = 469.099 amu Computer time = 1.50 seconds Orbital eigenvalues (eV) -44.30718 -41.82215 -39.75365 -38.45488 -37.99126 -36.78188 -36.57988 -35.32893 -32.86004 -31.89780 -30.41363 -29.98080 -29.25962 -29.00479 -27.79624 -27.54543 -27.26511 -26.71881 -25.35790 -24.08813 -22.98058 -22.49290 -20.61544 -20.33216 -19.55625 -18.66148 -18.55091 -18.10414 -17.68353 -17.61639 -17.11241 -16.49291 -16.30518 -15.97972 -15.91136 -15.88307 -15.45096 -15.23896 -15.09466 -15.00344 -14.78069 -14.72702 -14.50519 -14.33260 -13.95461 -13.87752 -13.54150 -13.40874 -13.38592 -13.31561 -13.14132 -13.10969 -13.01367 -12.89331 -12.87725 -12.80165 -12.71306 -12.32751 -12.10881 -12.06880 -11.76255 -11.64212 -11.60756 -11.49950 -11.38217 -11.34067 -11.27782 -11.22647 -10.88011 -10.26957 -10.16559 -10.01922 -9.89805 -9.10809 -0.94671 -0.41672 0.15749 0.86055 1.02814 1.21827 1.38257 1.51513 1.58250 1.71704 1.81165 1.82828 1.95735 2.14411 2.17327 2.50314 2.76541 2.89108 3.11419 3.19210 3.28740 3.44764 3.46560 3.70899 3.81998 3.97919 4.04406 4.17405 4.18212 4.21870 4.29491 4.33079 4.43062 4.47795 4.50198 4.52382 4.58401 4.66026 4.69672 4.79674 4.83856 4.86510 4.88173 4.88599 4.90871 4.92390 5.06522 5.15236 5.16058 5.23969 5.26977 5.40620 5.47943 5.48891 5.53605 5.54805 5.66087 5.73363 6.36929 6.38426 6.46467 6.76100 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.138 4.138 2 C -0.386 4.386 3 C -0.142 4.142 4 C -0.139 4.139 5 Si 1.325 2.675 6 C -0.518 4.518 7 C -0.524 4.524 8 O -0.609 6.609 9 C 0.083 3.917 10 C 0.097 3.903 11 N -0.639 5.639 12 C 0.610 3.390 13 O -0.563 6.563 14 C -0.167 4.167 15 C 0.164 3.836 16 N -0.357 5.357 17 C -0.082 4.082 18 C -0.052 4.052 19 O -0.551 6.551 20 Si 1.013 2.987 21 H -0.237 1.237 22 H -0.261 1.261 23 H -0.261 1.261 24 C 0.030 3.970 25 N -0.492 5.492 26 C 0.226 3.774 27 C -0.080 4.080 28 Br 0.008 6.992 29 C -0.037 4.037 30 C 0.060 3.940 31 H 0.063 0.937 32 H 0.043 0.957 33 H 0.062 0.938 34 H 0.061 0.939 35 H 0.046 0.954 36 H 0.064 0.936 37 H 0.060 0.940 38 H 0.044 0.956 39 H 0.058 0.942 40 H 0.075 0.925 41 H 0.075 0.925 42 H 0.077 0.923 43 H 0.069 0.931 44 H 0.075 0.925 45 H 0.071 0.929 46 H 0.123 0.877 47 H 0.087 0.913 48 H 0.109 0.891 49 H 0.197 0.803 50 H 0.138 0.862 51 H 0.390 0.610 52 H 0.212 0.788 53 H 0.186 0.814 54 H 0.124 0.876 55 H 0.110 0.890 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 1.471 2.910 -0.313 3.275 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 -0.195 4.195 2 C -0.428 4.428 3 C -0.200 4.200 4 C -0.196 4.196 5 Si 1.455 2.545 6 C -0.621 4.621 7 C -0.625 4.625 8 O -0.566 6.566 9 C 0.025 3.975 10 C -0.025 4.025 11 N -0.374 5.374 12 C 0.400 3.600 13 O -0.443 6.443 14 C -0.174 4.174 15 C 0.038 3.962 16 N -0.030 5.030 17 C -0.193 4.193 18 C -0.161 4.161 19 O -0.358 6.358 20 Si 0.832 3.168 21 H -0.160 1.160 22 H -0.185 1.185 23 H -0.185 1.185 24 C -0.119 4.119 25 N -0.211 5.211 26 C -0.020 4.020 27 C -0.162 4.162 28 Br 0.093 6.907 29 C -0.063 4.063 30 C -0.061 4.061 31 H 0.082 0.918 32 H 0.062 0.938 33 H 0.081 0.919 34 H 0.080 0.920 35 H 0.066 0.934 36 H 0.083 0.917 37 H 0.079 0.921 38 H 0.063 0.937 39 H 0.077 0.923 40 H 0.094 0.906 41 H 0.094 0.906 42 H 0.096 0.904 43 H 0.089 0.911 44 H 0.094 0.906 45 H 0.091 0.909 46 H 0.140 0.860 47 H 0.106 0.894 48 H 0.127 0.873 49 H 0.214 0.786 50 H 0.156 0.844 51 H 0.239 0.761 52 H 0.229 0.771 53 H 0.203 0.797 54 H 0.142 0.858 55 H 0.128 0.872 Dipole moment (debyes) X Y Z Total from point charges 0.519 2.369 0.615 2.501 hybrid contribution 1.039 0.244 -0.763 1.312 sum 1.558 2.612 -0.147 3.045 Atomic orbital electron populations 1.21560 0.94042 1.02093 1.01815 1.25998 1.00587 1.02840 1.13340 1.21616 1.01188 0.94995 1.02162 1.21560 1.00947 1.00235 0.96837 0.76087 0.62008 0.52379 0.64045 1.27122 1.07438 1.09770 1.17733 1.27199 1.25686 1.04958 1.04661 1.85422 1.78593 1.46550 1.46022 1.23348 0.96776 0.91187 0.86174 1.23516 1.00945 0.93423 0.84615 1.48905 1.48003 1.20960 1.19513 1.16911 0.81629 0.80135 0.81367 1.90859 1.40471 1.34971 1.78024 1.19138 1.01736 0.99707 0.96862 1.22248 0.92880 0.97990 0.83110 1.42712 1.23730 1.22423 1.14136 1.22485 1.07035 1.01310 0.88504 1.25087 0.82373 0.95086 1.13602 1.86503 1.29288 1.50507 1.69453 0.84830 0.81779 0.80543 0.69686 1.16041 1.18457 1.18478 1.22945 0.94181 0.93283 1.01480 1.70816 1.27226 1.18731 1.04356 1.20711 0.91047 0.93810 0.96404 1.20586 1.01719 0.98166 0.95750 1.96833 1.48523 1.46937 1.98405 1.21811 0.90855 0.97044 0.96545 1.24250 0.99173 0.81247 1.01474 0.91831 0.93816 0.91946 0.92000 0.93442 0.91680 0.92067 0.93718 0.92264 0.90584 0.90635 0.90393 0.91141 0.90585 0.90947 0.86010 0.89416 0.87275 0.78597 0.84436 0.76111 0.77147 0.79690 0.85844 0.87171 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 -0.14 0.46 7.85 71.98 0.56 1.03 16 2 C -0.39 1.57 0.53 -10.79 -0.01 1.56 16 3 C -0.14 0.53 7.85 71.98 0.56 1.10 16 4 C -0.14 0.35 7.85 71.98 0.56 0.91 16 5 Si 1.33 -9.96 8.24 68.60 0.57 -9.39 16 6 C -0.52 3.88 8.65 113.37 0.98 4.86 16 7 C -0.52 2.97 8.64 113.37 0.98 3.95 16 8 O -0.61 4.18 8.61 -148.98 -1.28 2.90 16 9 C 0.08 -0.66 3.92 31.02 0.12 -0.54 16 10 C 0.10 -0.44 8.45 83.19 0.70 0.26 16 11 N -0.64 1.44 3.67 -861.95 -3.16 -1.72 16 12 C 0.61 2.09 7.99 86.71 0.69 2.79 16 13 O -0.56 -6.09 17.07 -4.01 -0.07 -6.16 16 14 C -0.17 -0.24 5.84 -20.35 -0.12 -0.36 16 15 C 0.16 0.39 9.90 83.65 0.83 1.22 16 16 N -0.36 -1.35 2.93 -337.70 -0.99 -2.34 16 17 C -0.08 -0.10 6.24 41.01 0.26 0.16 16 18 C -0.05 0.19 3.06 71.24 0.22 0.40 16 19 O -0.55 1.27 10.90 -148.98 -1.62 -0.35 16 20 Si 1.01 -5.03 26.60 68.60 1.83 -3.21 16 21 H -0.24 1.38 6.84 99.48 0.68 2.06 16 22 H -0.26 0.75 7.11 99.48 0.71 1.45 16 23 H -0.26 0.56 7.11 99.48 0.71 1.26 16 24 C 0.03 0.09 10.44 83.68 0.87 0.96 16 25 N -0.49 -4.13 11.30 -194.10 -2.19 -6.33 16 26 C 0.23 1.49 7.59 134.18 1.02 2.51 16 27 C -0.08 -0.26 6.24 22.42 0.14 -0.12 16 28 Br 0.01 0.02 33.72 -20.37 -0.69 -0.67 16 29 C -0.04 0.03 8.85 22.55 0.20 0.23 16 30 C 0.06 -0.51 5.97 83.28 0.50 -0.02 16 31 H 0.06 -0.32 7.79 -2.39 -0.02 -0.34 16 32 H 0.04 -0.06 8.14 -2.38 -0.02 -0.08 16 33 H 0.06 -0.24 7.96 -2.39 -0.02 -0.25 16 34 H 0.06 -0.30 7.79 -2.38 -0.02 -0.32 16 35 H 0.05 -0.09 8.14 -2.38 -0.02 -0.10 16 36 H 0.06 -0.35 7.79 -2.39 -0.02 -0.37 16 37 H 0.06 -0.17 7.97 -2.39 -0.02 -0.19 16 38 H 0.04 -0.03 8.14 -2.39 -0.02 -0.05 16 39 H 0.06 -0.21 7.79 -2.39 -0.02 -0.23 16 40 H 0.08 -0.68 7.96 -2.39 -0.02 -0.70 16 41 H 0.07 -0.52 7.79 -2.38 -0.02 -0.53 16 42 H 0.08 -0.59 7.79 -2.39 -0.02 -0.61 16 43 H 0.07 -0.32 7.79 -2.39 -0.02 -0.34 16 44 H 0.08 -0.41 7.79 -2.39 -0.02 -0.43 16 45 H 0.07 -0.48 7.31 -2.39 -0.02 -0.50 16 46 H 0.12 -1.36 6.50 -2.39 -0.02 -1.38 16 47 H 0.09 -0.34 8.14 -2.39 -0.02 -0.36 16 48 H 0.11 -0.60 8.14 -2.39 -0.02 -0.62 16 49 H 0.20 0.40 6.21 -2.91 -0.02 0.38 16 50 H 0.14 -0.78 7.96 -2.39 -0.02 -0.80 16 51 H 0.39 -2.95 8.70 -74.05 -0.64 -3.60 16 52 H 0.21 -0.67 6.72 -2.91 -0.02 -0.69 16 53 H 0.19 -1.20 4.20 -2.91 -0.01 -1.21 16 54 H 0.12 -1.35 8.13 -2.39 -0.02 -1.37 16 55 H 0.11 -1.32 6.71 -2.39 -0.02 -1.33 16 Total: 0.00 -20.08 459.32 2.47 -17.61 By element: Atomic # 1 Polarization: -12.25 SS G_CDS: 1.01 Total: -11.24 kcal Atomic # 6 Polarization: 11.83 SS G_CDS: 9.08 Total: 20.91 kcal Atomic # 7 Polarization: -4.04 SS G_CDS: -6.34 Total: -10.39 kcal Atomic # 8 Polarization: -0.64 SS G_CDS: -2.97 Total: -3.62 kcal Atomic # 14 Polarization: -14.99 SS G_CDS: 2.39 Total: -12.60 kcal Atomic # 35 Polarization: 0.02 SS G_CDS: -0.69 Total: -0.67 kcal Total: -20.08 2.47 -17.61 kcal The number of atoms in the molecule is 55 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. m_22_18362370_12335884.mol2 55 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 9.387 kcal (2) G-P(sol) polarization free energy of solvation -20.079 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -10.691 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy 2.473 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -17.606 kcal (6) G-S(sol) free energy of system = (1) + (5) -8.219 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.51 seconds