Wall clock time and date at job start Sat Apr 11 2020 06:09:40 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 1.53004 * 1 3 3 C 1.52999 * 109.47063 * 2 1 4 4 C 1.53004 * 109.47063 * 180.02562 * 3 2 1 5 5 C 1.52996 * 109.47184 * 181.35095 * 4 3 2 6 6 H 1.08994 * 109.47212 * 305.86322 * 5 4 3 7 7 C 1.53006 * 109.46975 * 185.86481 * 5 4 3 8 8 C 1.52998 * 109.46936 * 65.14211 * 7 5 4 9 9 C 1.52997 * 109.47102 * 65.86846 * 5 4 3 10 10 N 1.46501 * 109.46933 * 185.00034 * 9 5 4 11 11 C 1.34775 * 119.99624 * 179.97438 * 10 9 5 12 12 O 1.21349 * 120.00287 * 0.02562 * 11 10 9 13 13 C 1.49455 * 119.99959 * 179.97438 * 11 10 9 14 14 O 1.21349 * 119.99754 * 0.02562 * 13 11 10 15 15 N 1.34775 * 119.99959 * 179.97438 * 13 11 10 16 16 C 1.47025 * 125.65095 * 0.02683 * 15 13 11 17 17 C 1.54324 * 107.39778 * 178.82717 * 16 15 13 18 18 C 1.55402 * 102.83175 * 337.97559 * 17 16 15 19 19 O 1.42900 * 110.89163 * 277.26675 * 18 17 16 20 20 C 1.50695 * 111.06695 * 153.48894 * 18 17 16 21 21 H 1.08004 * 120.00687 * 6.20883 * 20 18 17 22 22 C 1.37885 * 119.99891 * 186.20753 * 20 18 17 23 23 N 1.31513 * 119.99566 * 0.02562 * 22 20 18 24 24 Si 1.86796 * 120.00216 * 179.97438 * 22 20 18 25 25 H 1.48505 * 109.47106 * 60.00162 * 24 22 20 26 26 H 1.48497 * 109.47234 * 180.02562 * 24 22 20 27 27 H 1.48505 * 109.47247 * 300.00549 * 24 22 20 28 28 C 1.47430 * 125.64572 * 179.97438 * 15 13 11 29 29 H 1.08997 * 109.47008 * 179.97438 * 1 2 3 30 30 H 1.09004 * 109.46528 * 299.99702 * 1 2 3 31 31 H 1.08998 * 109.47047 * 59.99956 * 1 2 3 32 32 H 1.09004 * 109.46528 * 240.00298 * 2 1 3 33 33 H 1.08998 * 109.47047 * 120.00044 * 2 1 3 34 34 H 1.09004 * 109.47205 * 60.00713 * 3 2 1 35 35 H 1.08998 * 109.47225 * 299.99935 * 3 2 1 36 36 H 1.09002 * 109.46786 * 61.34780 * 4 3 2 37 37 H 1.09000 * 109.46989 * 301.35580 * 4 3 2 38 38 H 1.09000 * 109.47032 * 185.14037 * 7 5 4 39 39 H 1.08999 * 109.47190 * 305.14275 * 7 5 4 40 40 H 1.09000 * 109.47512 * 53.07930 * 8 7 5 41 41 H 1.09001 * 109.47192 * 173.08127 * 8 7 5 42 42 H 1.09002 * 109.47470 * 293.08011 * 8 7 5 43 43 H 1.08996 * 109.47541 * 64.99846 * 9 5 4 44 44 H 1.09005 * 109.46994 * 304.99737 * 9 5 4 45 45 H 0.96995 * 120.00023 * 359.97438 * 10 9 5 46 46 H 1.08995 * 109.87685 * 298.31961 * 16 15 13 47 47 H 1.08998 * 109.87895 * 59.33448 * 16 15 13 48 48 H 1.08993 * 110.71821 * 96.25059 * 17 16 15 49 49 H 1.09004 * 110.71444 * 219.52116 * 17 16 15 50 50 H 0.96695 * 114.00134 * 173.68408 * 19 18 17 51 51 H 0.97008 * 119.99826 * 179.97438 * 23 22 20 52 52 H 1.09004 * 110.36641 * 323.00793 * 28 15 13 53 53 H 1.09010 * 110.36253 * 85.21818 * 28 15 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 1.5300 0.0000 0.0000 3 6 2.0400 1.4425 0.0000 4 6 3.5701 1.4425 -0.0006 5 6 4.0801 2.8845 0.0334 6 1 3.6333 3.4474 -0.7861 7 6 5.6029 2.8905 -0.1146 8 6 5.9828 2.3626 -1.4994 9 6 3.6946 3.5305 1.3656 10 7 4.0771 4.9447 1.3514 11 6 3.8329 5.7196 2.4267 12 8 3.2967 5.2459 3.4068 13 6 4.2236 7.1621 2.4124 14 8 4.7602 7.6357 1.4324 15 7 3.9789 7.9372 3.4875 16 6 3.3381 7.4950 4.7347 17 6 3.2953 8.7086 5.6870 18 6 4.4229 9.6227 5.1320 19 8 5.6998 9.2141 5.6265 20 6 4.1578 11.0695 5.4594 21 1 3.3278 11.3357 6.0972 22 6 4.9749 12.0538 4.9448 23 7 5.9852 11.7298 4.1678 24 14 4.6459 13.8473 5.3501 25 1 4.7271 14.0457 6.8196 26 1 5.6587 14.7005 4.6782 27 1 3.2898 14.2217 4.8743 28 6 4.3106 9.3686 3.6081 29 1 -0.3633 -1.0276 -0.0005 30 1 -0.3632 0.5138 0.8901 31 1 -0.3633 0.5138 -0.8900 32 1 1.8933 -0.5138 -0.8901 33 1 1.8933 -0.5138 0.8900 34 1 1.6768 1.9563 0.8901 35 1 1.6767 1.9563 -0.8900 36 1 3.9330 0.9499 -0.9027 37 1 3.9337 0.9076 0.8767 38 1 5.9752 3.9084 0.0009 39 1 6.0449 2.2529 0.6511 40 1 5.4434 2.9234 -2.2627 41 1 7.0556 2.4810 -1.6517 42 1 5.7201 1.3071 -1.5706 43 1 4.2123 3.0223 2.1791 44 1 2.6177 3.4468 1.5119 45 1 4.5060 5.3232 0.5681 46 1 2.3250 7.1496 4.5286 47 1 3.9195 6.6906 5.1852 48 1 2.3294 9.2102 5.6293 49 1 3.5120 8.4033 6.7107 50 1 6.4443 9.6909 5.2348 51 1 6.5599 12.4223 3.8054 52 1 5.2604 9.5806 3.1171 53 1 3.5170 9.9794 3.1775 RHF calculation, no. of doubly occupied orbitals= 66 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 ZINC001118204936.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Sat Apr 11 2020 06:09:40 Heat of formation + Delta-G solvation = -151.300413 kcal Electronic energy + Delta-G solvation = -30434.990310 eV Core-core repulsion = 26305.467173 eV Total energy + Delta-G solvation = -4129.523137 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.75 seconds Orbital eigenvalues (eV) -40.36765 -38.82032 -37.81010 -37.14619 -35.23192 -34.35828 -33.55024 -32.25031 -30.83120 -30.20291 -28.37018 -27.84822 -25.94696 -24.79873 -23.46581 -23.24961 -21.61737 -21.35277 -20.46015 -19.73742 -19.29254 -17.37288 -17.10294 -16.65573 -16.00768 -15.85421 -15.34091 -15.18952 -15.11727 -14.64874 -14.56902 -14.38210 -14.10276 -13.62304 -13.55770 -13.37311 -13.18257 -13.03042 -12.91355 -12.78944 -12.44987 -12.26522 -12.01482 -11.82918 -11.66366 -11.63695 -11.50190 -11.34926 -11.08984 -11.08069 -11.03666 -10.90744 -10.78905 -10.63942 -10.57850 -10.56231 -10.50154 -10.21005 -9.37573 -9.16080 -9.11839 -8.70036 -8.40693 -7.89441 -6.29702 -4.39232 1.83114 2.69094 3.21718 3.27352 3.29402 3.63356 3.93070 4.25680 4.28757 4.37045 4.52977 4.67457 4.74753 4.80356 4.84995 4.97962 5.03652 5.14596 5.18215 5.30241 5.34116 5.36835 5.44407 5.49732 5.54515 5.56019 5.66964 5.70063 5.72319 5.80127 5.82477 5.84200 5.86970 5.93903 5.98795 6.06561 6.06863 6.10074 6.24917 6.37626 6.51916 6.73514 6.80899 6.85397 7.17395 7.26583 7.32702 7.72014 7.90125 8.01212 8.07600 8.46917 8.64668 9.28079 9.36587 10.77456 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.020032 B = 0.002141 C = 0.002024 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1397.458416 B =13073.279448 C =13829.919934 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.154 4.154 2 C -0.124 4.124 3 C -0.127 4.127 4 C -0.112 4.112 5 C -0.101 4.101 6 H 0.079 0.921 7 C -0.124 4.124 8 C -0.152 4.152 9 C 0.121 3.879 10 N -0.707 5.707 11 C 0.509 3.491 12 O -0.518 6.518 13 C 0.507 3.493 14 O -0.539 6.539 15 N -0.574 5.574 16 C 0.112 3.888 17 C -0.122 4.122 18 C 0.249 3.751 19 O -0.581 6.581 20 C -0.537 4.537 21 H 0.067 0.933 22 C 0.071 3.929 23 N -0.894 5.894 24 Si 0.905 3.095 25 H -0.274 1.274 26 H -0.286 1.286 27 H -0.275 1.275 28 C 0.092 3.908 29 H 0.052 0.948 30 H 0.055 0.945 31 H 0.053 0.947 32 H 0.059 0.941 33 H 0.061 0.939 34 H 0.066 0.934 35 H 0.062 0.938 36 H 0.070 0.930 37 H 0.065 0.935 38 H 0.066 0.934 39 H 0.065 0.935 40 H 0.054 0.946 41 H 0.054 0.946 42 H 0.055 0.945 43 H 0.070 0.930 44 H 0.073 0.927 45 H 0.411 0.589 46 H 0.064 0.936 47 H 0.070 0.930 48 H 0.078 0.922 49 H 0.076 0.924 50 H 0.381 0.619 51 H 0.271 0.729 52 H 0.091 0.909 53 H 0.067 0.933 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -5.166 -20.439 -9.971 23.320 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 -0.212 4.212 2 C -0.162 4.162 3 C -0.164 4.164 4 C -0.150 4.150 5 C -0.119 4.119 6 H 0.098 0.902 7 C -0.162 4.162 8 C -0.210 4.210 9 C -0.002 4.002 10 N -0.362 5.362 11 C 0.290 3.710 12 O -0.393 6.393 13 C 0.289 3.711 14 O -0.418 6.418 15 N -0.306 5.306 16 C -0.011 4.011 17 C -0.160 4.160 18 C 0.208 3.792 19 O -0.389 6.389 20 C -0.575 4.575 21 H 0.086 0.914 22 C -0.133 4.133 23 N -0.532 5.532 24 Si 0.732 3.268 25 H -0.200 1.200 26 H -0.211 1.211 27 H -0.200 1.200 28 C -0.028 4.028 29 H 0.071 0.929 30 H 0.074 0.926 31 H 0.072 0.928 32 H 0.078 0.922 33 H 0.080 0.920 34 H 0.085 0.915 35 H 0.081 0.919 36 H 0.089 0.911 37 H 0.084 0.916 38 H 0.085 0.915 39 H 0.084 0.916 40 H 0.074 0.926 41 H 0.073 0.927 42 H 0.074 0.926 43 H 0.089 0.911 44 H 0.091 0.909 45 H 0.247 0.753 46 H 0.082 0.918 47 H 0.088 0.912 48 H 0.096 0.904 49 H 0.095 0.905 50 H 0.230 0.770 51 H 0.081 0.919 52 H 0.109 0.891 53 H 0.086 0.914 Dipole moment (debyes) X Y Z Total from point charges -5.486 -20.904 -9.572 23.637 hybrid contribution 0.405 1.532 -0.604 1.696 sum -5.081 -19.372 -10.176 22.464 Atomic orbital electron populations 1.21786 0.95959 1.01491 1.01931 1.21524 0.95853 0.96928 1.01870 1.21741 0.95334 0.96852 1.02478 1.21620 0.95422 0.95233 1.02682 1.21491 0.96432 0.96973 0.97040 0.90230 1.21625 0.94668 1.02022 0.97887 1.21808 1.01320 1.01045 0.96787 1.21563 1.00795 0.80038 0.97833 1.45779 1.61749 1.10392 1.18231 1.20410 0.79557 0.87769 0.83254 1.90724 1.41055 1.74900 1.32610 1.19594 0.81597 0.86349 0.83553 1.90719 1.43669 1.74611 1.32834 1.48667 1.55551 1.12545 1.13857 1.22132 0.97033 0.97741 0.84198 1.22753 0.99674 0.94957 0.98568 1.19686 0.81418 0.91720 0.86382 1.86133 1.17034 1.66342 1.69442 1.21423 1.14458 0.90163 1.31459 0.91433 1.25094 0.94492 0.99966 0.93737 1.69704 1.16730 1.34475 1.32315 0.86438 0.78144 0.83428 0.78757 1.19971 1.21104 1.20010 1.23481 1.01806 0.75694 1.01867 0.92914 0.92630 0.92811 0.92213 0.92042 0.91511 0.91925 0.91102 0.91577 0.91516 0.91605 0.92640 0.92694 0.92614 0.91146 0.90865 0.75275 0.91796 0.91199 0.90363 0.90518 0.76971 0.91915 0.89114 0.91447 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 -0.96 9.91 37.16 0.37 -0.59 16 2 C -0.12 -0.77 5.93 -26.73 -0.16 -0.93 16 3 C -0.13 -0.84 5.02 -26.73 -0.13 -0.98 16 4 C -0.11 -0.72 4.56 -26.73 -0.12 -0.84 16 5 C -0.10 -0.76 1.88 -90.62 -0.17 -0.93 16 6 H 0.08 0.60 8.14 -51.93 -0.42 0.18 16 7 C -0.12 -0.97 5.33 -26.73 -0.14 -1.11 16 8 C -0.15 -1.02 9.50 37.16 0.35 -0.67 16 9 C 0.12 1.24 4.94 -4.04 -0.02 1.22 16 10 N -0.71 -9.23 5.23 -60.73 -0.32 -9.55 16 11 C 0.51 8.69 7.86 -11.58 -0.09 8.60 16 12 O -0.52 -9.52 14.12 5.50 0.08 -9.44 16 13 C 0.51 10.28 7.91 -11.58 -0.09 10.19 16 14 O -0.54 -11.84 16.73 5.50 0.09 -11.75 16 15 N -0.57 -12.29 3.33 -171.02 -0.57 -12.86 16 16 C 0.11 2.18 5.48 -3.06 -0.02 2.17 16 17 C -0.12 -2.49 6.15 -24.76 -0.15 -2.65 16 18 C 0.25 6.02 0.87 -89.50 -0.08 5.95 16 19 O -0.58 -14.82 13.16 -35.23 -0.46 -15.29 16 20 C -0.54 -13.85 8.28 -34.44 -0.29 -14.14 16 21 H 0.07 1.70 7.79 -52.48 -0.41 1.30 16 22 C 0.07 1.82 5.29 -17.82 -0.09 1.72 16 23 N -0.89 -23.53 10.69 55.43 0.59 -22.94 16 24 Si 0.91 20.18 29.54 -169.99 -5.02 15.16 16 25 H -0.27 -6.11 7.11 56.52 0.40 -5.71 16 26 H -0.29 -6.36 7.11 56.52 0.40 -5.95 16 27 H -0.27 -6.07 7.11 56.52 0.40 -5.67 16 28 C 0.09 2.20 5.39 -2.53 -0.01 2.19 16 29 H 0.05 0.30 8.14 -51.93 -0.42 -0.13 16 30 H 0.05 0.36 8.14 -51.93 -0.42 -0.06 16 31 H 0.05 0.33 8.14 -51.93 -0.42 -0.10 16 32 H 0.06 0.34 8.14 -51.93 -0.42 -0.08 16 33 H 0.06 0.38 8.14 -51.93 -0.42 -0.04 16 34 H 0.07 0.50 6.43 -51.93 -0.33 0.17 16 35 H 0.06 0.42 8.14 -51.93 -0.42 0.00 16 36 H 0.07 0.41 6.47 -51.93 -0.34 0.07 16 37 H 0.07 0.43 8.14 -51.93 -0.42 0.01 16 38 H 0.07 0.59 7.07 -51.93 -0.37 0.23 16 39 H 0.07 0.51 8.14 -51.93 -0.42 0.09 16 40 H 0.05 0.36 8.14 -51.93 -0.42 -0.06 16 41 H 0.05 0.37 8.14 -51.93 -0.42 -0.05 16 42 H 0.05 0.33 6.79 -51.93 -0.35 -0.02 16 43 H 0.07 0.76 8.14 -51.93 -0.42 0.34 16 44 H 0.07 0.77 6.35 -51.93 -0.33 0.44 16 45 H 0.41 5.02 7.12 -40.82 -0.29 4.73 16 46 H 0.06 1.15 7.70 -51.93 -0.40 0.75 16 47 H 0.07 1.38 7.57 -51.93 -0.39 0.99 16 48 H 0.08 1.50 8.03 -51.93 -0.42 1.08 16 49 H 0.08 1.51 8.14 -51.93 -0.42 1.09 16 50 H 0.38 9.87 7.56 45.56 0.34 10.21 16 51 H 0.27 6.87 8.31 -40.82 -0.34 6.53 16 52 H 0.09 2.39 7.33 -51.93 -0.38 2.01 16 53 H 0.07 1.64 8.03 -51.92 -0.42 1.22 16 LS Contribution 416.82 15.07 6.28 6.28 Total: -1.00 -28.71 416.82 -8.89 -37.60 By element: Atomic # 1 Polarization: 22.27 SS G_CDS: -8.71 Total: 13.56 kcal Atomic # 6 Polarization: 10.06 SS G_CDS: -0.85 Total: 9.22 kcal Atomic # 7 Polarization: -45.05 SS G_CDS: -0.29 Total: -45.34 kcal Atomic # 8 Polarization: -36.19 SS G_CDS: -0.29 Total: -36.48 kcal Atomic # 14 Polarization: 20.18 SS G_CDS: -5.02 Total: 15.16 kcal Total LS contribution 6.28 Total: 6.28 kcal Total: -28.71 -8.89 -37.60 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. ZINC001118204936.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 -113.700 kcal (2) G-P(sol) polarization free energy of solvation -28.712 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -142.412 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.888 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -37.600 kcal (6) G-S(sol) free energy of system = (1) + (5) -151.300 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.75 seconds