Wall clock time and date at job start Tue Mar 31 2020 19:41:13 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 1.31003 * 1 3 3 C 1.50697 * 120.00425 * 2 1 4 4 H 1.09004 * 109.98443 * 358.91266 * 3 2 1 5 5 O 1.43738 * 109.87787 * 237.83294 * 3 2 1 6 6 C 1.44379 * 106.97734 * 267.08589 * 5 3 2 7 7 C 1.55000 * 103.48756 * 319.94225 * 6 5 3 8 8 C 1.54099 * 109.87801 * 119.99711 * 3 2 1 9 9 H 1.08996 * 110.48887 * 358.58929 * 8 3 2 10 10 C 1.50697 * 110.48548 * 236.06972 * 8 3 2 11 11 O 1.21283 * 120.00521 * 359.73059 * 10 8 3 12 12 N 1.34784 * 119.99774 * 180.02562 * 10 8 3 13 13 C 1.46499 * 119.99893 * 179.72962 * 12 10 8 14 14 H 1.09002 * 109.47048 * 324.99733 * 13 12 10 15 15 C 1.53004 * 109.46824 * 204.99873 * 13 12 10 16 16 N 1.46507 * 109.46980 * 55.00128 * 15 13 12 17 17 C 1.36938 * 119.99671 * 179.97438 * 16 15 13 18 18 H 1.07990 * 120.00485 * 0.02562 * 17 16 15 19 19 C 1.38817 * 119.99772 * 179.97438 * 17 16 15 20 20 N 1.31622 * 119.99709 * 0.02562 * 19 17 16 21 21 Si 1.86793 * 120.00078 * 180.02562 * 19 17 16 22 22 H 1.48499 * 109.47143 * 90.00485 * 21 19 17 23 23 H 1.48506 * 109.47171 * 210.00498 * 21 19 17 24 24 H 1.48502 * 109.46970 * 330.00293 * 21 19 17 25 25 C 1.52995 * 109.47258 * 85.00288 * 13 12 10 26 26 C 1.52997 * 109.47473 * 59.99614 * 25 13 12 27 27 C 1.52998 * 109.47165 * 179.97438 * 26 25 13 28 28 C 1.53002 * 109.46752 * 60.00505 * 27 26 25 29 29 C 1.52998 * 109.47068 * 299.99154 * 28 27 26 30 30 C 1.53004 * 109.46864 * 299.99561 * 25 13 12 31 31 H 1.08001 * 120.00002 * 359.97438 * 1 2 3 32 32 H 1.08002 * 120.00041 * 179.97438 * 1 2 3 33 33 H 1.08002 * 119.99551 * 179.97438 * 2 1 3 34 34 H 1.08995 * 110.61687 * 78.44113 * 6 5 3 35 35 H 1.08999 * 110.61867 * 201.28453 * 6 5 3 36 36 H 1.09002 * 110.90694 * 278.82258 * 7 6 5 37 37 H 1.08997 * 110.90553 * 155.21587 * 7 6 5 38 38 H 0.97005 * 119.99846 * 359.72750 * 12 10 8 39 39 H 1.08996 * 109.47116 * 174.99417 * 15 13 12 40 40 H 1.08992 * 109.47265 * 295.00085 * 15 13 12 41 41 H 0.96995 * 119.99766 * 359.97438 * 16 15 13 42 42 H 0.97000 * 119.99566 * 179.97438 * 20 19 17 43 43 H 1.09007 * 109.47281 * 179.97438 * 25 13 12 44 44 H 1.08998 * 109.46926 * 300.00256 * 26 25 13 45 45 H 1.09003 * 109.47129 * 59.99899 * 26 25 13 46 46 H 1.08998 * 109.47555 * 300.00051 * 27 26 25 47 47 H 1.08997 * 109.47278 * 179.97438 * 27 26 25 48 48 H 1.09009 * 109.46944 * 179.97438 * 28 27 26 49 49 H 1.08998 * 109.47683 * 59.99994 * 28 27 26 50 50 H 1.08998 * 109.47554 * 300.00919 * 29 28 27 51 51 H 1.08997 * 109.47358 * 179.97438 * 29 28 27 52 52 H 1.08997 * 109.47519 * 300.00087 * 30 25 13 53 53 H 1.08998 * 109.47319 * 60.00518 * 30 25 13 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 1.3100 0.0000 0.0000 3 6 2.0636 1.3050 0.0000 4 1 1.3629 2.1398 -0.0194 5 8 2.9312 1.3684 -1.1442 6 6 4.2186 0.8667 -0.7254 7 6 4.3946 1.4631 0.6944 8 6 2.9531 1.3965 1.2551 9 1 2.8247 0.5120 1.8789 10 6 2.6336 2.6437 2.0382 11 8 1.7781 3.4064 1.6415 12 7 3.3028 2.9147 3.1763 13 6 2.9963 4.1302 3.9345 14 1 2.7421 4.9346 3.2442 15 6 4.2170 4.5358 4.7630 16 7 5.3804 4.6737 3.8832 17 6 6.5945 5.0327 4.4049 18 1 6.6946 5.2137 5.4648 19 6 7.6969 5.1629 3.5714 20 7 7.5750 4.9418 2.2797 21 14 9.3533 5.6518 4.2831 22 1 10.1042 4.4314 4.6732 23 1 10.1275 6.4045 3.2636 24 1 9.1452 6.5082 5.4783 25 6 1.8125 3.8650 4.8667 26 6 2.1693 2.7359 5.8356 27 6 0.9857 2.4712 6.7683 28 6 -0.2353 2.0658 5.9402 29 6 -0.5922 3.1949 4.9714 30 6 0.5919 3.4594 4.0382 31 1 -0.5400 0.9353 0.0004 32 1 -0.5400 -0.9353 -0.0004 33 1 1.8500 -0.9354 0.0004 34 1 4.2118 -0.2225 -0.6861 35 1 5.0042 1.2206 -1.3931 36 1 4.7446 2.4941 0.6426 37 1 5.0725 0.8530 1.2912 38 1 3.9872 2.3049 3.4934 39 1 4.0207 5.4871 5.2575 40 1 4.4174 3.7709 5.5131 41 1 5.2905 4.5108 2.9313 42 1 8.3453 5.0331 1.6972 43 1 1.5848 4.7693 5.4312 44 1 2.3973 1.8316 5.2715 45 1 3.0390 3.0249 6.4258 46 1 0.7582 3.3756 7.3324 47 1 1.2397 1.6665 7.4582 48 1 -1.0785 1.8767 6.6047 49 1 -0.0078 1.1613 5.3761 50 1 -0.8197 4.0994 5.5354 51 1 -1.4617 2.9059 4.3811 52 1 0.3376 4.2638 3.3480 53 1 0.8198 2.5550 3.4742 RHF calculation, no. of doubly occupied orbitals= 65 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 ZINC001496321300.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Tue Mar 31 2020 19:41:13 Heat of formation + Delta-G solvation = -72.914383 kcal Electronic energy + Delta-G solvation = -31450.679846 eV Core-core repulsion = 27515.011834 eV Total energy + Delta-G solvation = -3935.668012 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 0.91 seconds Orbital eigenvalues (eV) -40.63609 -39.28646 -37.68529 -35.68878 -33.81117 -33.59814 -32.52767 -31.07137 -30.61661 -30.48240 -28.50437 -27.07747 -24.19797 -23.47690 -22.76155 -22.28410 -21.72887 -20.41381 -20.01826 -19.83322 -19.24893 -17.46154 -16.99181 -16.47364 -15.93093 -15.79125 -15.43040 -14.96628 -14.64478 -14.37189 -14.10477 -14.03742 -13.90082 -13.72523 -13.36766 -13.18230 -13.04757 -12.99034 -12.40393 -12.24264 -12.16238 -11.95053 -11.84273 -11.56805 -11.42728 -11.26270 -11.06228 -10.98703 -10.96618 -10.87213 -10.81994 -10.77665 -10.38113 -10.19649 -10.07100 -9.79350 -9.73444 -9.66929 -9.61184 -9.33725 -8.92449 -8.57177 -6.98285 -5.81516 -3.10835 2.08780 2.90130 3.39222 3.44174 3.45898 3.47055 4.07463 4.52539 4.54754 4.63603 4.76302 4.78721 4.82887 4.85965 5.05959 5.12004 5.19496 5.23201 5.30214 5.34961 5.43680 5.47294 5.49879 5.54466 5.61709 5.64863 5.69598 5.74108 5.78467 5.81871 5.84619 5.93805 5.98984 6.03698 6.08788 6.14431 6.18447 6.21492 6.28900 6.32863 6.43764 6.45134 6.47951 6.53477 6.63937 6.64680 6.71926 6.91270 6.96744 7.65042 7.85841 8.36499 8.53417 9.48605 10.04410 10.40030 11.40696 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.008152 B = 0.004655 C = 0.003150 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 3433.991366 B = 6013.381821 C = 8887.142842 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.172 4.172 2 C -0.173 4.173 3 C 0.113 3.887 4 H 0.120 0.880 5 O -0.363 6.363 6 C 0.046 3.954 7 C -0.143 4.143 8 C -0.137 4.137 9 H 0.104 0.896 10 C 0.526 3.474 11 O -0.540 6.540 12 N -0.703 5.703 13 C 0.143 3.857 14 H 0.086 0.914 15 C 0.143 3.857 16 N -0.730 5.730 17 C -0.242 4.242 18 H 0.070 0.930 19 C -0.010 4.010 20 N -0.930 5.930 21 Si 0.906 3.094 22 H -0.290 1.290 23 H -0.292 1.292 24 H -0.282 1.282 25 C -0.093 4.093 26 C -0.115 4.115 27 C -0.118 4.118 28 C -0.117 4.117 29 C -0.120 4.120 30 C -0.104 4.104 31 H 0.100 0.900 32 H 0.098 0.902 33 H 0.108 0.892 34 H 0.058 0.942 35 H 0.097 0.903 36 H 0.094 0.906 37 H 0.089 0.911 38 H 0.403 0.597 39 H 0.031 0.969 40 H 0.029 0.971 41 H 0.386 0.614 42 H 0.255 0.745 43 H 0.075 0.925 44 H 0.059 0.941 45 H 0.069 0.931 46 H 0.059 0.941 47 H 0.056 0.944 48 H 0.054 0.946 49 H 0.057 0.943 50 H 0.057 0.943 51 H 0.055 0.945 52 H 0.067 0.933 53 H 0.060 0.940 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -14.381 -11.484 1.954 18.507 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 -0.192 4.192 3 C 0.055 3.945 4 H 0.138 0.862 5 O -0.282 6.282 6 C -0.030 4.030 7 C -0.181 4.181 8 C -0.159 4.159 9 H 0.122 0.878 10 C 0.312 3.688 11 O -0.417 6.417 12 N -0.353 5.353 13 C 0.038 3.962 14 H 0.104 0.896 15 C 0.015 3.985 16 N -0.375 5.375 17 C -0.373 4.373 18 H 0.088 0.912 19 C -0.207 4.207 20 N -0.578 5.578 21 Si 0.737 3.263 22 H -0.218 1.218 23 H -0.218 1.218 24 H -0.208 1.208 25 C -0.113 4.113 26 C -0.152 4.152 27 C -0.155 4.155 28 C -0.155 4.155 29 C -0.158 4.158 30 C -0.141 4.141 31 H 0.119 0.881 32 H 0.117 0.883 33 H 0.126 0.874 34 H 0.077 0.923 35 H 0.115 0.885 36 H 0.113 0.887 37 H 0.108 0.892 38 H 0.238 0.762 39 H 0.049 0.951 40 H 0.046 0.954 41 H 0.220 0.780 42 H 0.065 0.935 43 H 0.094 0.906 44 H 0.078 0.922 45 H 0.087 0.913 46 H 0.078 0.922 47 H 0.075 0.925 48 H 0.072 0.928 49 H 0.076 0.924 50 H 0.076 0.924 51 H 0.074 0.926 52 H 0.086 0.914 53 H 0.079 0.921 Dipole moment (debyes) X Y Z Total from point charges -14.910 -10.782 1.584 18.468 hybrid contribution 1.447 -0.265 0.504 1.555 sum -13.462 -11.047 2.088 17.539 Atomic orbital electron populations 1.23881 0.95813 1.02061 0.99167 1.23337 0.96439 0.98514 1.00891 1.21876 0.92303 0.96428 0.83905 0.86206 1.88970 1.21537 1.84839 1.32842 1.23575 0.86386 0.97847 0.95236 1.23161 0.94085 1.04479 0.96403 1.22666 0.97372 0.97981 0.97836 0.87755 1.20023 0.81180 0.86904 0.80699 1.90658 1.32978 1.49535 1.68572 1.45870 1.39896 1.25318 1.24201 1.21297 0.94681 0.86990 0.93229 0.89554 1.21033 0.86321 0.98123 0.93061 1.42339 1.04651 1.83566 1.06966 1.19200 0.86333 1.38933 0.92879 0.91235 1.24721 0.98012 1.02467 0.95452 1.69660 1.29868 1.55763 1.02523 0.86217 0.84298 0.78014 0.77789 1.21763 1.21786 1.20799 1.21519 0.94864 0.98739 0.96172 1.21626 0.97722 0.98638 0.97247 1.21522 0.95349 1.00923 0.97711 1.21521 0.97570 0.98492 0.97906 1.21582 0.98232 0.98339 0.97613 1.21616 0.93501 1.02127 0.96872 0.88137 0.88329 0.87388 0.92342 0.88527 0.88714 0.89243 0.76242 0.95121 0.95351 0.78031 0.93510 0.90635 0.92185 0.91289 0.92201 0.92495 0.92750 0.92439 0.92413 0.92632 0.91389 0.92083 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 -0.17 -1.75 14.32 29.01 0.42 -1.33 16 2 C -0.17 -1.94 8.87 -36.03 -0.32 -2.26 16 3 C 0.11 1.53 3.44 -27.31 -0.09 1.44 16 4 H 0.12 1.86 6.12 -51.93 -0.32 1.55 16 5 O -0.36 -5.44 11.18 -35.23 -0.39 -5.84 16 6 C 0.05 0.57 7.66 38.21 0.29 0.86 16 7 C -0.14 -1.88 6.69 -24.72 -0.17 -2.05 16 8 C -0.14 -1.75 3.06 -90.24 -0.28 -2.03 16 9 H 0.10 1.11 7.69 -51.93 -0.40 0.71 16 10 C 0.53 8.03 5.37 -10.98 -0.06 7.97 16 11 O -0.54 -9.63 12.38 5.56 0.07 -9.56 16 12 N -0.70 -10.43 3.63 -53.81 -0.20 -10.62 16 13 C 0.14 2.27 2.16 -67.93 -0.15 2.12 16 14 H 0.09 1.60 7.58 -51.93 -0.39 1.21 16 15 C 0.14 2.65 5.60 -4.04 -0.02 2.62 16 16 N -0.73 -17.36 5.43 -59.91 -0.33 -17.68 16 17 C -0.24 -6.48 9.99 -15.06 -0.15 -6.63 16 18 H 0.07 1.81 7.83 -52.49 -0.41 1.40 16 19 C -0.01 -0.28 5.50 -17.43 -0.10 -0.38 16 20 N -0.93 -27.08 13.06 55.49 0.72 -26.36 16 21 Si 0.91 21.82 29.55 -169.99 -5.02 16.80 16 22 H -0.29 -6.94 7.11 56.52 0.40 -6.54 16 23 H -0.29 -7.15 7.11 56.52 0.40 -6.74 16 24 H -0.28 -6.66 7.11 56.52 0.40 -6.26 16 25 C -0.09 -1.22 2.07 -90.62 -0.19 -1.41 16 26 C -0.11 -1.36 4.70 -26.73 -0.13 -1.48 16 27 C -0.12 -1.22 5.92 -26.73 -0.16 -1.37 16 28 C -0.12 -1.19 5.92 -26.73 -0.16 -1.35 16 29 C -0.12 -1.33 5.93 -26.70 -0.16 -1.49 16 30 C -0.10 -1.37 3.73 -26.70 -0.10 -1.47 16 31 H 0.10 1.05 7.85 -52.49 -0.41 0.64 16 32 H 0.10 0.81 8.06 -52.49 -0.42 0.38 16 33 H 0.11 1.06 8.06 -52.49 -0.42 0.64 16 34 H 0.06 0.60 8.14 -51.93 -0.42 0.17 16 35 H 0.10 1.13 8.14 -51.93 -0.42 0.71 16 36 H 0.09 1.55 7.86 -51.93 -0.41 1.14 16 37 H 0.09 1.03 8.14 -51.93 -0.42 0.61 16 38 H 0.40 5.77 8.60 -40.82 -0.35 5.42 16 39 H 0.03 0.59 8.14 -51.93 -0.42 0.17 16 40 H 0.03 0.51 6.17 -51.93 -0.32 0.19 16 41 H 0.39 9.79 7.33 -40.82 -0.30 9.49 16 42 H 0.26 7.25 8.31 -40.82 -0.34 6.91 16 43 H 0.08 0.99 8.14 -51.93 -0.42 0.56 16 44 H 0.06 0.72 7.60 -51.93 -0.39 0.32 16 45 H 0.07 0.86 6.32 -51.93 -0.33 0.53 16 46 H 0.06 0.61 8.14 -51.93 -0.42 0.19 16 47 H 0.06 0.54 8.14 -51.93 -0.42 0.12 16 48 H 0.05 0.49 8.14 -51.92 -0.42 0.07 16 49 H 0.06 0.60 8.14 -51.93 -0.42 0.18 16 50 H 0.06 0.62 8.14 -51.93 -0.42 0.20 16 51 H 0.05 0.59 8.14 -51.93 -0.42 0.17 16 52 H 0.07 1.02 7.53 -51.93 -0.39 0.63 16 53 H 0.06 0.86 5.78 -51.93 -0.30 0.56 16 LS Contribution 405.75 15.07 6.11 6.11 Total: -1.00 -30.18 405.75 -9.90 -40.07 By element: Atomic # 1 Polarization: 24.69 SS G_CDS: -9.36 Total: 15.33 kcal Atomic # 6 Polarization: -6.74 SS G_CDS: -1.51 Total: -8.25 kcal Atomic # 7 Polarization: -54.87 SS G_CDS: 0.20 Total: -54.67 kcal Atomic # 8 Polarization: -15.08 SS G_CDS: -0.32 Total: -15.40 kcal Atomic # 14 Polarization: 21.82 SS G_CDS: -5.02 Total: 16.80 kcal Total LS contribution 6.11 Total: 6.11 kcal Total: -30.18 -9.90 -40.07 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. ZINC001496321300.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 -32.841 kcal (2) G-P(sol) polarization free energy of solvation -30.176 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -63.017 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.897 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.073 kcal (6) G-S(sol) free energy of system = (1) + (5) -72.914 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.91 seconds