Wall clock time and date at job start Tue Mar 31 2020 20:04:17 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 1.52995 * 1 3 3 C 1.53001 * 109.47519 * 2 1 4 4 H 1.09002 * 109.46709 * 54.99630 * 3 2 1 5 5 C 1.53005 * 109.46838 * 295.00501 * 3 2 1 6 6 C 1.50698 * 109.47744 * 175.00002 * 3 2 1 7 7 O 1.21279 * 119.99836 * 94.72232 * 6 3 2 8 8 N 1.34772 * 119.99874 * 274.72844 * 6 3 2 9 9 C 1.46929 * 120.61086 * 4.98490 * 8 6 3 10 10 C 1.53694 * 108.50409 * 125.81878 * 9 8 6 11 11 C 1.52505 * 109.36293 * 54.02344 * 10 9 8 12 12 C 1.54194 * 109.96894 * 178.11388 * 11 10 9 13 13 C 1.54568 * 101.66750 * 216.76140 * 12 11 10 14 14 N 1.46819 * 105.49079 * 25.03792 * 13 12 11 15 15 C 1.46498 * 124.36451 * 163.06294 * 14 13 12 16 16 C 1.52995 * 109.47092 * 89.99800 * 15 14 13 17 17 C 1.50701 * 109.47080 * 179.97438 * 16 15 14 18 18 H 1.07995 * 120.00097 * 0.02562 * 17 16 15 19 19 C 1.37878 * 119.99712 * 180.02562 * 17 16 15 20 20 N 1.31509 * 120.00592 * 0.02562 * 19 17 16 21 21 Si 1.86808 * 119.99565 * 180.02562 * 19 17 16 22 22 H 1.48501 * 109.47160 * 359.97438 * 21 19 17 23 23 H 1.48501 * 109.46794 * 120.00096 * 21 19 17 24 24 H 1.48507 * 109.46854 * 239.99824 * 21 19 17 25 25 C 1.34565 * 111.27235 * 343.06567 * 14 13 12 26 26 O 1.21281 * 125.01405 * 180.70384 * 25 14 13 27 27 C 1.52505 * 110.83504 * 299.92035 * 11 10 9 28 28 C 1.46936 * 120.60379 * 185.26415 * 8 6 3 29 29 H 1.08997 * 109.47053 * 60.00094 * 1 2 3 30 30 H 1.08996 * 109.47016 * 299.99824 * 1 2 3 31 31 H 1.08998 * 109.47099 * 180.02562 * 1 2 3 32 32 H 1.09008 * 109.47486 * 120.00163 * 2 1 3 33 33 H 1.09004 * 109.47110 * 239.99863 * 2 1 3 34 34 H 1.08995 * 109.47052 * 175.27033 * 5 3 2 35 35 H 1.09001 * 109.46903 * 295.26164 * 5 3 2 36 36 H 1.08996 * 109.47620 * 55.26851 * 5 3 2 37 37 H 1.08997 * 109.59272 * 245.64159 * 9 8 6 38 38 H 1.09003 * 109.59343 * 6.08420 * 9 8 6 39 39 H 1.08999 * 109.61596 * 293.99891 * 10 9 8 40 40 H 1.08994 * 109.42512 * 173.93157 * 10 9 8 41 41 H 1.08999 * 110.98757 * 334.85953 * 12 11 10 42 42 H 1.09001 * 110.98579 * 98.66884 * 12 11 10 43 43 H 1.09005 * 110.24386 * 144.03909 * 13 12 11 44 44 H 1.08999 * 110.24686 * 265.95089 * 13 12 11 45 45 H 1.09002 * 109.47331 * 210.00571 * 15 14 13 46 46 H 1.09001 * 109.46908 * 330.00410 * 15 14 13 47 47 H 1.08993 * 109.47804 * 300.00437 * 16 15 14 48 48 H 1.09007 * 109.47140 * 60.00481 * 16 15 14 49 49 H 0.96997 * 120.00887 * 179.97438 * 20 19 17 50 50 H 1.09006 * 109.47264 * 299.97521 * 27 11 10 51 51 H 1.08993 * 109.47919 * 179.97438 * 27 11 10 52 52 H 1.09006 * 109.59703 * 353.91266 * 28 8 6 53 53 H 1.08992 * 109.59587 * 114.21368 * 28 8 6 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 2.0401 1.4425 0.0000 4 1 1.6054 1.9815 0.8418 5 6 1.6352 2.1265 -1.3074 6 6 3.5419 1.4443 0.1238 7 8 4.2324 1.5011 -0.8716 8 7 4.1178 1.3828 1.3408 9 6 3.2992 1.2039 2.5477 10 6 3.8315 -0.0121 3.3223 11 6 5.3238 0.1667 3.5807 12 6 5.8630 -1.0240 4.3987 13 6 6.8948 -0.3306 5.3172 14 7 6.4495 1.0643 5.4242 15 6 6.9028 2.0002 6.4560 16 6 8.1487 2.7388 5.9629 17 6 8.6147 3.7020 7.0241 18 1 8.0763 3.7793 7.9571 19 6 9.7283 4.4845 6.8038 20 7 10.3836 4.3907 5.6675 21 14 10.3063 5.6779 8.1196 22 1 9.4034 5.5935 9.2956 23 1 11.6899 5.3290 8.5310 24 1 10.2847 7.0605 7.5778 25 6 5.5712 1.3723 4.4523 26 8 5.0553 2.4593 4.2995 27 6 6.0910 0.2868 2.2681 28 6 5.5754 1.4995 1.4854 29 1 -0.3633 0.5138 -0.8900 30 1 -0.3633 0.5138 0.8900 31 1 -0.3633 -1.0276 0.0005 32 1 1.8934 -0.5139 0.8900 33 1 1.8933 -0.5139 -0.8900 34 1 1.9246 3.1768 -1.2726 35 1 2.1371 1.6389 -2.1431 36 1 0.5557 2.0513 -1.4377 37 1 3.3667 2.0958 3.1706 38 1 2.2611 1.0320 2.2631 39 1 3.6699 -0.9178 2.7377 40 1 3.3055 -0.0947 4.2733 41 1 5.0686 -1.4874 4.9838 42 1 6.3463 -1.7556 3.7511 43 1 6.9007 -0.8010 6.3004 44 1 7.8883 -0.3774 4.8712 45 1 6.1123 2.7209 6.6656 46 1 7.1431 1.4497 7.3656 47 1 8.9392 2.0182 5.7533 48 1 7.9085 3.2893 5.0533 49 1 11.1668 4.9414 5.5123 50 1 5.9433 -0.6170 1.6769 51 1 7.1529 0.4139 2.4781 52 1 6.0399 1.5227 0.4995 53 1 5.8170 2.4152 2.0248 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 ZINC001270484777.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 20:04:17 Heat of formation + Delta-G solvation = -89.177400 kcal Electronic energy + Delta-G solvation = -30981.335960 eV Core-core repulsion = 27044.962731 eV Total energy + Delta-G solvation = -3936.373229 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 0.88 seconds Orbital eigenvalues (eV) -41.25626 -39.85010 -36.90331 -36.13789 -35.72970 -34.15341 -32.76575 -31.30495 -30.57952 -29.83830 -28.51421 -26.37335 -25.43302 -24.87605 -23.48536 -22.65577 -21.89868 -21.37142 -20.44768 -19.11080 -18.15862 -17.51298 -16.63577 -16.03670 -15.96324 -15.60312 -15.32257 -15.17616 -14.77342 -14.48736 -14.34200 -14.08796 -13.94306 -13.52648 -13.24407 -13.20973 -13.00940 -12.83243 -12.68608 -12.42857 -12.36335 -12.29025 -12.17499 -12.03817 -11.92097 -11.70045 -11.53705 -11.31808 -11.22681 -11.03617 -10.98454 -10.97091 -10.70761 -10.62588 -10.55946 -10.03172 -9.88748 -9.63089 -9.35020 -9.11337 -8.45683 -8.40201 -8.06109 -6.05020 -4.08715 2.62208 2.95336 3.01294 3.28687 3.35852 3.39252 3.50341 4.26900 4.30892 4.38306 4.43206 4.54385 4.58774 4.64300 4.83014 4.95288 5.01243 5.06838 5.10534 5.15061 5.24214 5.30710 5.31334 5.32400 5.39788 5.48326 5.55825 5.60817 5.66308 5.67246 5.69725 5.72176 5.75167 5.78836 5.83983 5.90463 5.98153 6.00820 6.03004 6.06004 6.10328 6.21196 6.41511 6.54044 6.76722 6.95636 7.44476 7.48113 7.63560 7.81194 7.94244 8.19735 8.30432 8.63011 8.98191 9.55702 11.06347 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.017708 B = 0.002702 C = 0.002540 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1580.861247 B =10362.004176 C =11020.828630 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.152 4.152 2 C -0.114 4.114 3 C -0.112 4.112 4 H 0.092 0.908 5 C -0.137 4.137 6 C 0.518 3.482 7 O -0.547 6.547 8 N -0.601 5.601 9 C 0.094 3.906 10 C -0.108 4.108 11 C -0.094 4.094 12 C -0.125 4.125 13 C 0.101 3.899 14 N -0.609 5.609 15 C 0.128 3.872 16 C 0.012 3.988 17 C -0.522 4.522 18 H 0.057 0.943 19 C 0.059 3.941 20 N -0.892 5.892 21 Si 0.894 3.106 22 H -0.272 1.272 23 H -0.284 1.284 24 H -0.283 1.283 25 C 0.523 3.477 26 O -0.525 6.525 27 C -0.109 4.109 28 C 0.107 3.893 29 H 0.059 0.941 30 H 0.056 0.944 31 H 0.057 0.943 32 H 0.067 0.933 33 H 0.069 0.931 34 H 0.056 0.944 35 H 0.067 0.933 36 H 0.063 0.937 37 H 0.099 0.901 38 H 0.082 0.918 39 H 0.073 0.927 40 H 0.077 0.923 41 H 0.081 0.919 42 H 0.088 0.912 43 H 0.076 0.924 44 H 0.071 0.929 45 H 0.070 0.930 46 H 0.065 0.935 47 H 0.016 0.984 48 H 0.020 0.980 49 H 0.261 0.739 50 H 0.075 0.925 51 H 0.082 0.918 52 H 0.092 0.908 53 H 0.080 0.920 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -17.984 -14.773 -8.136 24.655 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 -0.210 4.210 2 C -0.152 4.152 3 C -0.133 4.133 4 H 0.110 0.890 5 C -0.194 4.194 6 C 0.306 3.694 7 O -0.425 6.425 8 N -0.334 5.334 9 C -0.029 4.029 10 C -0.146 4.146 11 C -0.098 4.098 12 C -0.163 4.163 13 C -0.023 4.023 14 N -0.342 5.342 15 C 0.008 3.992 16 C -0.026 4.026 17 C -0.561 4.561 18 H 0.075 0.925 19 C -0.143 4.143 20 N -0.531 5.531 21 Si 0.722 3.278 22 H -0.197 1.197 23 H -0.210 1.210 24 H -0.209 1.209 25 C 0.309 3.691 26 O -0.402 6.402 27 C -0.148 4.148 28 C -0.015 4.015 29 H 0.078 0.922 30 H 0.075 0.925 31 H 0.076 0.924 32 H 0.085 0.915 33 H 0.088 0.912 34 H 0.075 0.925 35 H 0.086 0.914 36 H 0.082 0.918 37 H 0.117 0.883 38 H 0.101 0.899 39 H 0.091 0.909 40 H 0.095 0.905 41 H 0.099 0.901 42 H 0.106 0.894 43 H 0.094 0.906 44 H 0.089 0.911 45 H 0.089 0.911 46 H 0.083 0.917 47 H 0.035 0.965 48 H 0.039 0.961 49 H 0.071 0.929 50 H 0.094 0.906 51 H 0.100 0.900 52 H 0.110 0.890 53 H 0.098 0.902 Dipole moment (debyes) X Y Z Total from point charges -17.690 -14.035 -8.743 24.215 hybrid contribution 0.680 0.633 0.931 1.315 sum -17.010 -13.402 -7.812 23.022 Atomic orbital electron populations 1.21826 0.94962 1.01920 1.02245 1.21491 0.96466 0.94333 1.02868 1.21378 0.92177 0.98682 1.01101 0.88979 1.21700 1.01049 1.00563 0.96092 1.20645 0.90511 0.75639 0.82607 1.90661 1.65004 1.50429 1.36428 1.48022 1.07593 1.71572 1.06195 1.22159 0.94060 1.00110 0.86575 1.21771 0.93443 0.98577 1.00831 1.21038 0.97122 0.95492 0.96101 1.22712 0.98990 0.96582 0.97985 1.22052 0.98013 0.81918 1.00297 1.48582 1.43172 1.12281 1.30125 1.21811 0.99060 0.90402 0.87915 1.19398 0.90936 0.94942 0.97279 1.21111 1.11526 1.21728 1.01757 0.92463 1.25002 0.96560 0.97131 0.95571 1.69972 1.19187 1.40232 1.23673 0.86509 0.78529 0.80990 0.81810 1.19667 1.20974 1.20929 1.20360 0.78997 0.88681 0.81090 1.90638 1.52485 1.25273 1.71836 1.21717 1.00067 0.99294 0.93705 1.21663 0.79602 0.98562 1.01662 0.92164 0.92475 0.92441 0.91461 0.91243 0.92457 0.91425 0.91773 0.88310 0.89928 0.90867 0.90454 0.90065 0.89365 0.90599 0.91055 0.91142 0.91695 0.96531 0.96112 0.92947 0.90601 0.89951 0.88958 0.90163 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 -0.90 9.67 37.16 0.36 -0.54 16 2 C -0.11 -0.88 5.09 -26.73 -0.14 -1.02 16 3 C -0.11 -1.09 1.85 -91.77 -0.17 -1.26 16 4 H 0.09 0.80 6.72 -51.93 -0.35 0.45 16 5 C -0.14 -1.29 8.69 37.16 0.32 -0.96 16 6 C 0.52 6.98 6.80 -10.99 -0.07 6.90 16 7 O -0.55 -9.28 15.41 5.56 0.09 -9.20 16 8 N -0.60 -7.91 2.96 -172.40 -0.51 -8.42 16 9 C 0.09 1.05 5.51 -3.45 -0.02 1.03 16 10 C -0.11 -1.07 4.81 -26.62 -0.13 -1.20 16 11 C -0.09 -1.13 0.55 -155.48 -0.09 -1.21 16 12 C -0.12 -1.19 6.20 -25.28 -0.16 -1.34 16 13 C 0.10 1.26 7.35 -3.04 -0.02 1.24 16 14 N -0.61 -10.37 2.94 -172.47 -0.51 -10.88 16 15 C 0.13 2.62 5.87 -4.05 -0.02 2.59 16 16 C 0.01 0.32 5.30 -27.88 -0.15 0.17 16 17 C -0.52 -14.65 9.11 -34.44 -0.31 -14.97 16 18 H 0.06 1.54 7.74 -52.49 -0.41 1.14 16 19 C 0.06 1.70 5.46 -17.82 -0.10 1.60 16 20 N -0.89 -26.89 13.29 55.43 0.74 -26.15 16 21 Si 0.89 21.62 29.54 -169.99 -5.02 16.60 16 22 H -0.27 -6.40 7.11 56.52 0.40 -6.00 16 23 H -0.28 -6.75 7.11 56.52 0.40 -6.34 16 24 H -0.28 -6.84 7.11 56.52 0.40 -6.44 16 25 C 0.52 8.80 6.25 -11.02 -0.07 8.73 16 26 O -0.53 -10.64 13.73 5.56 0.08 -10.56 16 27 C -0.11 -1.35 4.78 -26.84 -0.13 -1.48 16 28 C 0.11 1.57 6.02 -3.66 -0.02 1.55 16 29 H 0.06 0.34 6.47 -51.93 -0.34 0.01 16 30 H 0.06 0.31 8.14 -51.93 -0.42 -0.11 16 31 H 0.06 0.30 8.14 -51.93 -0.42 -0.12 16 32 H 0.07 0.50 7.20 -51.92 -0.37 0.12 16 33 H 0.07 0.59 8.14 -51.93 -0.42 0.17 16 34 H 0.06 0.58 8.14 -51.93 -0.42 0.16 16 35 H 0.07 0.72 7.69 -51.93 -0.40 0.32 16 36 H 0.06 0.46 6.36 -51.93 -0.33 0.13 16 37 H 0.10 1.38 5.85 -51.93 -0.30 1.08 16 38 H 0.08 0.71 4.89 -51.93 -0.25 0.45 16 39 H 0.07 0.60 8.14 -51.93 -0.42 0.18 16 40 H 0.08 0.70 8.13 -51.93 -0.42 0.28 16 41 H 0.08 0.65 7.88 -51.93 -0.41 0.24 16 42 H 0.09 0.68 7.87 -51.93 -0.41 0.27 16 43 H 0.08 0.83 8.14 -51.93 -0.42 0.40 16 44 H 0.07 0.92 8.14 -51.93 -0.42 0.49 16 45 H 0.07 1.52 7.94 -51.93 -0.41 1.10 16 46 H 0.06 1.21 8.14 -51.93 -0.42 0.79 16 47 H 0.02 0.44 8.14 -51.93 -0.42 0.02 16 48 H 0.02 0.60 8.14 -51.92 -0.42 0.17 16 49 H 0.26 7.41 8.31 -40.82 -0.34 7.07 16 50 H 0.08 0.81 8.14 -51.93 -0.42 0.39 16 51 H 0.08 1.07 8.14 -51.93 -0.42 0.65 16 52 H 0.09 1.41 6.99 -51.93 -0.36 1.05 16 53 H 0.08 1.40 6.85 -51.93 -0.36 1.05 16 LS Contribution 403.08 15.07 6.07 6.07 Total: -1.00 -34.24 403.08 -9.31 -43.55 By element: Atomic # 1 Polarization: 8.49 SS G_CDS: -9.33 Total: -0.84 kcal Atomic # 6 Polarization: 0.74 SS G_CDS: -0.91 Total: -0.17 kcal Atomic # 7 Polarization: -45.17 SS G_CDS: -0.28 Total: -45.45 kcal Atomic # 8 Polarization: -19.92 SS G_CDS: 0.16 Total: -19.76 kcal Atomic # 14 Polarization: 21.62 SS G_CDS: -5.02 Total: 16.60 kcal Total LS contribution 6.07 Total: 6.07 kcal Total: -34.24 -9.31 -43.55 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. ZINC001270484777.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 -45.627 kcal (2) G-P(sol) polarization free energy of solvation -34.243 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -79.869 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.308 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.551 kcal (6) G-S(sol) free energy of system = (1) + (5) -89.177 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.88 seconds