Wall clock time and date at job start Wed Apr 1 2020 02:25:49 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 1.52991 * 1 3 3 C 1.53001 * 112.84926 * 2 1 4 4 C 1.53782 * 113.61643 * 131.19192 * 2 1 3 5 5 C 1.53781 * 87.08428 * 89.11703 * 4 2 1 6 6 C 1.53788 * 87.17025 * 25.39024 * 5 4 2 7 7 H 1.09002 * 113.61214 * 89.15466 * 6 5 4 8 8 C 1.50701 * 113.61800 * 220.06235 * 6 5 4 9 9 O 1.21280 * 120.00163 * 129.16568 * 8 6 5 10 10 N 1.34781 * 119.99727 * 309.17170 * 8 6 5 11 11 C 1.46497 * 119.99723 * 179.97438 * 10 8 6 12 12 C 1.52997 * 109.46859 * 179.97438 * 11 10 8 13 13 H 1.08998 * 109.77375 * 294.99911 * 12 11 10 14 14 C 1.52792 * 109.77440 * 174.25454 * 12 11 10 15 15 C 1.50602 * 110.85795 * 192.91264 * 14 12 11 16 16 C 1.38980 * 117.62295 * 200.06564 * 15 14 12 17 17 C 1.37904 * 120.58061 * 180.43837 * 16 15 14 18 18 C 1.38273 * 119.82635 * 0.09150 * 17 16 15 19 19 C 1.37954 * 119.71665 * 359.76290 * 18 17 16 20 20 C 1.37664 * 122.85630 * 20.15640 * 15 14 12 21 21 C 1.50809 * 122.34743 * 358.57796 * 20 15 14 22 22 N 1.46671 * 109.71900 * 11.47210 * 21 20 15 23 23 C 1.36932 * 121.33846 * 135.64729 * 22 21 20 24 24 H 1.07998 * 120.00713 * 144.23953 * 23 22 21 25 25 C 1.38821 * 119.99804 * 324.24738 * 23 22 21 26 26 N 1.31616 * 120.00173 * 158.63816 * 25 23 22 27 27 Si 1.86796 * 119.99767 * 338.64416 * 25 23 22 28 28 H 1.48501 * 109.47254 * 95.15896 * 27 25 23 29 29 H 1.48505 * 109.46840 * 215.15853 * 27 25 23 30 30 H 1.48497 * 109.47447 * 335.15895 * 27 25 23 31 31 H 1.09003 * 109.47162 * 283.63155 * 1 2 3 32 32 H 1.09002 * 109.47267 * 43.63291 * 1 2 3 33 33 H 1.09004 * 109.47489 * 163.63597 * 1 2 3 34 34 H 1.08998 * 109.47126 * 171.69633 * 3 2 1 35 35 H 1.08997 * 109.46667 * 291.68680 * 3 2 1 36 36 H 1.08991 * 109.47365 * 51.69164 * 3 2 1 37 37 H 1.09007 * 113.61635 * 334.56904 * 4 2 1 38 38 H 1.09003 * 113.61500 * 203.66669 * 4 2 1 39 39 H 1.08999 * 113.61831 * 139.97796 * 5 4 2 40 40 H 1.08997 * 113.61583 * 270.80609 * 5 4 2 41 41 H 0.96996 * 119.99584 * 359.97438 * 10 8 6 42 42 H 1.09000 * 109.47618 * 300.00002 * 11 10 8 43 43 H 1.09005 * 109.47001 * 60.00285 * 11 10 8 44 44 H 1.09005 * 109.20279 * 313.26969 * 14 12 11 45 45 H 1.09001 * 109.20257 * 72.59879 * 14 12 11 46 46 H 1.07997 * 119.71087 * 0.45263 * 16 15 14 47 47 H 1.08001 * 120.08681 * 180.11014 * 17 16 15 48 48 H 1.08000 * 120.14021 * 179.79543 * 18 17 16 49 49 H 1.08002 * 119.74845 * 179.97438 * 19 18 17 50 50 H 1.09004 * 109.43564 * 131.57796 * 21 20 15 51 51 H 1.09005 * 109.43754 * 251.49042 * 21 20 15 52 52 H 0.96993 * 120.00212 * 180.02562 * 26 25 23 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 2.1240 1.4099 0.0000 4 6 2.1460 -0.9280 1.0603 5 6 2.0930 -2.0426 0.0022 6 6 2.1448 -0.9318 -1.0602 7 1 3.1575 -0.6533 -1.3516 8 6 1.2427 -1.1831 -2.2409 9 8 0.4724 -0.3219 -2.6096 10 7 1.2919 -2.3648 -2.8871 11 6 0.4146 -2.6093 -4.0346 12 6 0.6692 -4.0156 -4.5806 13 1 1.6825 -4.0795 -4.9770 14 6 -0.3385 -4.3317 -5.6849 15 6 -0.3217 -5.7993 -6.0222 16 6 -0.8382 -6.1834 -7.2539 17 6 -0.8613 -7.5123 -7.6215 18 6 -0.3685 -8.4734 -6.7580 19 6 0.1476 -8.0947 -5.5360 20 6 0.1769 -6.7564 -5.1674 21 6 0.7787 -6.4084 -3.8292 22 7 0.4910 -5.0069 -3.5066 23 6 0.0722 -4.6352 -2.2570 24 1 0.3939 -3.6934 -1.8374 25 6 -0.7658 -5.4690 -1.5293 26 7 -0.8371 -5.3507 -0.2204 27 14 -1.7922 -6.7590 -2.4078 28 1 -1.0744 -8.0588 -2.3904 29 1 -3.0990 -6.9059 -1.7177 30 1 -2.0194 -6.3378 -3.8135 31 1 -0.3634 0.2422 0.9987 32 1 -0.3634 0.7438 -0.7091 33 1 -0.3634 -0.9860 -0.2895 34 1 3.2022 1.3499 0.1484 35 1 1.9151 1.8921 -0.9549 36 1 1.6781 1.9921 0.8063 37 1 1.4945 -1.1067 1.9158 38 1 3.1590 -0.6484 1.3496 39 1 2.9717 -2.6875 0.0028 40 1 1.1575 -2.6019 0.0036 41 1 1.9082 -3.0534 -2.5923 42 1 -0.6259 -2.5237 -3.7213 43 1 0.6213 -1.8748 -4.8130 44 1 -1.3373 -4.0524 -5.3494 45 1 -0.0860 -3.7568 -6.5759 46 1 -1.2247 -5.4345 -7.9293 47 1 -1.2629 -7.8017 -8.5814 48 1 -0.3872 -9.5159 -7.0393 49 1 0.5322 -8.8449 -4.8610 50 1 0.3515 -7.0528 -3.0608 51 1 1.8581 -6.5560 -3.8674 52 1 -1.4223 -5.9336 0.2881 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 ZINC001054049963.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Wed Apr 1 2020 02:25:49 Heat of formation + Delta-G solvation = 35.828702 kcal Electronic energy + Delta-G solvation = -31568.871945 eV Core-core repulsion = 27727.460777 eV Total energy + Delta-G solvation = -3841.411168 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 342.205 amu Computer time = 1.52 seconds Orbital eigenvalues (eV) -40.34024 -39.59221 -37.77722 -36.51090 -33.83298 -32.92127 -31.78763 -30.74870 -30.18428 -29.37526 -27.08265 -26.92790 -25.65037 -24.76169 -23.11971 -22.16815 -21.75922 -21.19063 -20.09132 -19.03598 -18.06066 -17.16785 -16.33529 -15.99396 -15.56302 -15.34479 -15.12153 -14.89259 -14.63591 -14.43170 -14.00299 -13.73271 -13.58368 -13.28904 -12.94966 -12.91796 -12.75715 -12.62113 -12.60754 -12.24904 -12.03833 -11.79909 -11.68767 -11.55146 -11.43310 -11.24551 -11.16934 -11.08657 -10.92768 -10.66643 -10.47109 -10.38453 -10.27797 -10.05198 -9.99845 -9.73619 -9.56916 -8.93195 -8.65291 -8.43310 -8.16373 -8.08157 -6.96977 -6.03254 -3.47106 1.69331 1.73455 3.28139 3.30064 3.47126 3.57302 3.86160 4.09154 4.49242 4.68666 4.75235 4.83761 5.02985 5.10322 5.13872 5.17014 5.22524 5.29274 5.32357 5.50734 5.53596 5.61620 5.70319 5.74344 5.81602 5.85209 5.88086 5.92862 5.96139 6.00672 6.05999 6.15848 6.18452 6.23395 6.28083 6.31098 6.33143 6.36228 6.39201 6.42678 6.45486 6.53100 6.65578 6.75688 6.76250 6.78221 6.82272 6.93446 7.10046 7.17381 7.36749 7.90239 8.22365 8.31448 8.85301 8.91920 9.62608 10.03522 11.08728 Molecular weight = 342.20amu Principal moments of inertia in cm(-1) A = 0.016423 B = 0.003654 C = 0.003246 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1704.513363 B = 7660.471368 C = 8622.759454 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.123 4.123 2 C -0.057 4.057 3 C -0.133 4.133 4 C -0.135 4.135 5 C -0.127 4.127 6 C -0.129 4.129 7 H 0.107 0.893 8 C 0.522 3.478 9 O -0.556 6.556 10 N -0.701 5.701 11 C 0.137 3.863 12 C 0.158 3.842 13 H 0.049 0.951 14 C -0.096 4.096 15 C -0.056 4.056 16 C -0.127 4.127 17 C -0.133 4.133 18 C -0.130 4.130 19 C -0.126 4.126 20 C -0.081 4.081 21 C 0.167 3.833 22 N -0.600 5.600 23 C -0.284 4.284 24 H 0.115 0.885 25 C 0.040 3.960 26 N -0.895 5.895 27 Si 0.861 3.139 28 H -0.289 1.289 29 H -0.306 1.306 30 H -0.258 1.258 31 H 0.047 0.953 32 H 0.066 0.934 33 H 0.062 0.938 34 H 0.050 0.950 35 H 0.057 0.943 36 H 0.053 0.947 37 H 0.069 0.931 38 H 0.076 0.924 39 H 0.069 0.931 40 H 0.106 0.894 41 H 0.411 0.589 42 H 0.073 0.927 43 H 0.057 0.943 44 H 0.078 0.922 45 H 0.065 0.935 46 H 0.115 0.885 47 H 0.114 0.886 48 H 0.115 0.885 49 H 0.117 0.883 50 H 0.078 0.922 51 H 0.045 0.955 52 H 0.262 0.738 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 6.557 3.288 -5.983 9.466 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 -0.180 4.180 2 C -0.058 4.058 3 C -0.190 4.190 4 C -0.173 4.173 5 C -0.165 4.165 6 C -0.150 4.150 7 H 0.125 0.875 8 C 0.308 3.692 9 O -0.435 6.435 10 N -0.353 5.353 11 C 0.013 3.987 12 C 0.052 3.948 13 H 0.066 0.934 14 C -0.136 4.136 15 C -0.056 4.056 16 C -0.145 4.145 17 C -0.151 4.151 18 C -0.148 4.148 19 C -0.144 4.144 20 C -0.083 4.083 21 C 0.043 3.957 22 N -0.324 5.324 23 C -0.411 4.411 24 H 0.132 0.868 25 C -0.161 4.161 26 N -0.536 5.536 27 Si 0.691 3.309 28 H -0.217 1.217 29 H -0.234 1.234 30 H -0.183 1.183 31 H 0.066 0.934 32 H 0.085 0.915 33 H 0.081 0.919 34 H 0.070 0.930 35 H 0.076 0.924 36 H 0.072 0.928 37 H 0.088 0.912 38 H 0.095 0.905 39 H 0.088 0.912 40 H 0.124 0.876 41 H 0.248 0.752 42 H 0.091 0.909 43 H 0.075 0.925 44 H 0.096 0.904 45 H 0.084 0.916 46 H 0.133 0.867 47 H 0.132 0.868 48 H 0.133 0.867 49 H 0.135 0.865 50 H 0.095 0.905 51 H 0.063 0.937 52 H 0.072 0.928 Dipole moment (debyes) X Y Z Total from point charges 5.935 3.875 -6.060 9.325 hybrid contribution -0.659 -1.567 -0.427 1.753 sum 5.276 2.307 -6.487 8.675 Atomic orbital electron populations 1.21590 0.92417 1.03299 1.00689 1.21633 0.96291 0.93543 0.94327 1.21717 0.99667 0.95871 1.01775 1.23025 1.00512 0.96638 0.97115 1.22940 1.04425 0.95403 0.93722 1.22915 0.99369 0.99759 0.92980 0.87515 1.20345 0.83677 0.81790 0.83358 1.90617 1.40410 1.45180 1.67294 1.46114 1.41170 1.16177 1.31858 1.21218 0.95696 0.94466 0.87329 1.20875 0.96039 0.89122 0.88771 0.93351 1.20956 1.01869 0.91712 0.99024 1.19476 0.97373 0.95608 0.93129 1.21153 1.00765 0.96051 0.96547 1.20913 1.01411 0.93271 0.99474 1.20945 1.00309 0.98918 0.94627 1.21109 1.00859 0.95680 0.96772 1.20431 0.97565 0.92693 0.97577 1.20108 0.96998 0.87562 0.91077 1.44444 1.78676 1.00729 1.08583 1.19468 1.24656 1.08396 0.88598 0.86832 1.25489 0.97167 0.98202 0.95284 1.69796 1.39105 1.39919 1.04812 0.87201 0.80502 0.81726 0.81439 1.21705 1.23376 1.18253 0.93391 0.91539 0.91945 0.93043 0.92351 0.92783 0.91175 0.90546 0.91189 0.87552 0.75205 0.90885 0.92475 0.90361 0.91624 0.86680 0.86763 0.86672 0.86531 0.90469 0.93742 0.92768 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 18. 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 -0.12 -2.02 7.58 37.15 0.28 -1.74 16 2 C -0.06 -0.82 1.19 -153.61 -0.18 -1.01 16 3 C -0.13 -1.63 9.16 37.16 0.34 -1.29 16 4 C -0.14 -1.81 7.23 -25.92 -0.19 -2.00 16 5 C -0.13 -1.95 6.95 -25.91 -0.18 -2.13 16 6 C -0.13 -1.92 3.69 -90.86 -0.34 -2.26 16 7 H 0.11 1.38 8.10 -51.93 -0.42 0.96 16 8 C 0.52 9.35 6.23 -10.98 -0.07 9.28 16 9 O -0.56 -11.47 14.70 5.56 0.08 -11.38 16 10 N -0.70 -12.35 3.21 -60.29 -0.19 -12.55 16 11 C 0.14 2.44 4.54 -4.04 -0.02 2.42 16 12 C 0.16 2.79 3.01 -67.64 -0.20 2.59 16 13 H 0.05 0.80 8.14 -51.93 -0.42 0.38 16 14 C -0.10 -1.61 5.21 -28.04 -0.15 -1.76 16 15 C -0.06 -0.98 5.62 -104.60 -0.59 -1.57 16 16 C -0.13 -1.96 9.59 -39.43 -0.38 -2.34 16 17 C -0.13 -1.90 10.04 -39.69 -0.40 -2.30 16 18 C -0.13 -1.92 10.05 -39.67 -0.40 -2.32 16 19 C -0.13 -2.12 9.62 -39.46 -0.38 -2.50 16 20 C -0.08 -1.52 4.21 -104.56 -0.44 -1.96 16 21 C 0.17 3.38 5.13 -5.05 -0.03 3.35 16 22 N -0.60 -12.50 2.47 -166.39 -0.41 -12.91 16 23 C -0.28 -6.86 8.35 -15.06 -0.13 -6.98 16 24 H 0.11 2.77 4.44 -52.49 -0.23 2.54 16 25 C 0.04 1.06 5.27 -17.43 -0.09 0.96 16 26 N -0.90 -25.26 13.97 55.49 0.78 -24.48 16 27 Si 0.86 21.46 24.40 -169.99 -4.15 17.32 16 28 H -0.29 -7.07 6.69 56.52 0.38 -6.69 16 29 H -0.31 -8.02 7.11 56.52 0.40 -7.62 16 30 H -0.26 -6.46 6.20 56.52 0.35 -6.11 16 31 H 0.05 0.70 8.14 -51.93 -0.42 0.28 16 32 H 0.07 1.14 7.30 -51.93 -0.38 0.77 16 33 H 0.06 1.21 6.70 -51.93 -0.35 0.86 16 34 H 0.05 0.55 8.01 -51.93 -0.42 0.13 16 35 H 0.06 0.76 8.14 -51.93 -0.42 0.34 16 36 H 0.05 0.61 8.14 -51.93 -0.42 0.18 16 37 H 0.07 0.96 8.10 -51.92 -0.42 0.54 16 38 H 0.08 0.87 8.01 -51.93 -0.42 0.46 16 39 H 0.07 0.99 8.14 -51.93 -0.42 0.57 16 40 H 0.11 2.06 7.19 -51.93 -0.37 1.69 16 41 H 0.41 7.16 6.94 -40.82 -0.28 6.88 16 42 H 0.07 1.50 7.88 -51.93 -0.41 1.09 16 43 H 0.06 0.93 8.14 -51.93 -0.42 0.50 16 44 H 0.08 1.42 8.02 -51.93 -0.42 1.01 16 45 H 0.07 0.91 8.10 -51.93 -0.42 0.49 16 46 H 0.12 1.50 8.05 -52.49 -0.42 1.08 16 47 H 0.11 1.31 8.06 -52.49 -0.42 0.88 16 48 H 0.12 1.38 8.06 -52.49 -0.42 0.96 16 49 H 0.12 1.81 8.05 -52.49 -0.42 1.38 16 50 H 0.08 1.73 3.95 -51.93 -0.21 1.53 16 51 H 0.05 0.83 8.14 -51.93 -0.42 0.41 16 52 H 0.26 7.24 8.31 -40.82 -0.34 6.90 16 LS Contribution 391.70 15.07 5.90 5.90 Total: -1.00 -29.17 391.70 -10.12 -39.29 By element: Atomic # 1 Polarization: 20.97 SS G_CDS: -8.60 Total: 12.37 kcal Atomic # 6 Polarization: -10.03 SS G_CDS: -3.53 Total: -13.56 kcal Atomic # 7 Polarization: -50.11 SS G_CDS: 0.17 Total: -49.94 kcal Atomic # 8 Polarization: -11.47 SS G_CDS: 0.08 Total: -11.38 kcal Atomic # 14 Polarization: 21.46 SS G_CDS: -4.15 Total: 17.32 kcal Total LS contribution 5.90 Total: 5.90 kcal Total: -29.17 -10.12 -39.29 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. ZINC001054049963.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 75.119 kcal (2) G-P(sol) polarization free energy of solvation -29.170 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 45.949 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.120 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -39.290 kcal (6) G-S(sol) free energy of system = (1) + (5) 35.829 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.52 seconds