Wall clock time and date at job start Tue Mar 31 2020 12:38:09 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 1.52992 * 1 3 3 C 1.52997 * 109.47482 * 2 1 4 4 O 1.42898 * 109.47319 * 180.02562 * 3 2 1 5 5 C 1.35900 * 117.00172 * 179.97438 * 4 3 2 6 6 C 1.38746 * 120.05467 * 359.72752 * 5 4 3 7 7 C 1.38131 * 119.94707 * 179.69741 * 6 5 4 8 8 C 1.38290 * 120.04957 * 0.59675 * 7 6 5 9 9 C 1.38250 * 120.11062 * 359.67603 * 8 7 6 10 10 C 1.50704 * 119.96871 * 180.02562 * 9 8 7 11 11 C 1.52995 * 109.47036 * 270.02264 * 10 9 8 12 12 N 1.46896 * 109.46893 * 179.97438 * 11 10 9 13 13 C 1.46904 * 111.00103 * 179.97438 * 12 11 10 14 14 C 1.52996 * 109.47357 * 179.97438 * 13 12 11 15 15 C 1.53005 * 109.47449 * 300.00856 * 14 13 12 16 16 C 1.53008 * 109.46859 * 60.00355 * 14 13 12 17 17 C 1.52996 * 109.47572 * 180.02562 * 14 13 12 18 18 C 1.50692 * 109.47641 * 180.02562 * 17 14 13 19 19 H 1.08001 * 120.00056 * 359.97438 * 18 17 14 20 20 C 1.37875 * 120.00240 * 180.02562 * 18 17 14 21 21 N 1.31520 * 120.00198 * 359.97438 * 20 18 17 22 22 Si 1.86806 * 120.00279 * 180.02562 * 20 18 17 23 23 H 1.48503 * 109.46729 * 359.97438 * 22 20 18 24 24 H 1.48493 * 109.47169 * 119.99529 * 22 20 18 25 25 H 1.48501 * 109.47075 * 239.99863 * 22 20 18 26 26 C 1.38162 * 120.05723 * 0.02573 * 9 8 7 27 27 H 1.09002 * 109.47103 * 300.00247 * 1 2 3 28 28 H 1.09001 * 109.47066 * 60.00169 * 1 2 3 29 29 H 1.08996 * 109.47747 * 179.97438 * 1 2 3 30 30 H 1.09002 * 109.47103 * 239.99753 * 2 1 3 31 31 H 1.08998 * 109.46862 * 120.00565 * 2 1 3 32 32 H 1.09002 * 109.47153 * 59.99783 * 3 2 1 33 33 H 1.09001 * 109.46832 * 299.99974 * 3 2 1 34 34 H 1.08010 * 120.02919 * 359.97292 * 6 5 4 35 35 H 1.07993 * 119.97567 * 180.29505 * 7 6 5 36 36 H 1.07997 * 119.94208 * 179.70200 * 8 7 6 37 37 H 1.09003 * 109.46632 * 30.02434 * 10 9 8 38 38 H 1.08996 * 109.46429 * 150.02007 * 10 9 8 39 39 H 1.08996 * 109.47184 * 299.99748 * 11 10 9 40 40 H 1.09005 * 109.47118 * 60.00026 * 11 10 9 41 41 H 1.00907 * 111.00256 * 56.04803 * 12 11 10 42 42 H 1.08993 * 109.47205 * 300.00771 * 13 12 11 43 43 H 1.09006 * 109.46291 * 60.00623 * 13 12 11 44 44 H 1.08997 * 109.47065 * 59.99425 * 15 14 13 45 45 H 1.08997 * 109.47154 * 180.02562 * 15 14 13 46 46 H 1.09005 * 109.46900 * 299.99532 * 15 14 13 47 47 H 1.08999 * 109.46713 * 60.00085 * 16 14 13 48 48 H 1.08997 * 109.46784 * 179.97438 * 16 14 13 49 49 H 1.08994 * 109.47182 * 299.99780 * 16 14 13 50 50 H 1.08999 * 109.47098 * 300.00588 * 17 14 13 51 51 H 1.09003 * 109.46918 * 59.99770 * 17 14 13 52 52 H 0.96996 * 120.00238 * 180.02562 * 21 20 18 53 53 H 1.07998 * 120.02891 * 180.02562 * 26 9 8 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 2.0400 1.4424 0.0000 4 8 3.4690 1.4424 -0.0006 5 6 4.0860 2.6532 -0.0012 6 6 3.3316 3.8176 -0.0070 7 6 3.9610 5.0472 -0.0013 8 6 5.3421 5.1181 -0.0023 9 6 6.0961 3.9593 -0.0023 10 6 7.6009 4.0404 -0.0029 11 6 8.1096 4.0680 -1.4455 12 7 9.5764 4.1476 -1.4460 13 6 10.1017 4.1755 -2.8177 14 6 11.6288 4.2591 -2.7774 15 6 12.0508 5.5336 -2.0435 16 6 12.1871 3.0388 -2.0423 17 6 12.1759 4.2888 -4.2059 18 6 13.6801 4.3705 -4.1663 19 1 14.1945 4.3988 -3.2171 20 6 14.3996 4.4101 -5.3417 21 7 13.7732 4.3761 -6.4977 22 14 16.2643 4.5106 -5.2926 23 1 16.7216 4.5349 -3.8800 24 1 16.8420 3.3280 -5.9801 25 1 16.7115 5.7495 -5.9786 26 6 5.4712 2.7271 -0.0018 27 1 -0.3633 0.5139 0.8900 28 1 -0.3633 0.5138 -0.8900 29 1 -0.3634 -1.0276 -0.0005 30 1 1.8933 -0.5139 -0.8900 31 1 1.8932 -0.5139 0.8899 32 1 1.6767 1.9563 0.8900 33 1 1.6767 1.9563 -0.8900 34 1 2.2529 3.7627 -0.0114 35 1 3.3742 5.9537 -0.0009 36 1 5.8324 6.0804 -0.0027 37 1 7.9160 4.9486 0.5110 38 1 8.0117 3.1711 0.5107 39 1 7.7945 3.1599 -1.9593 40 1 7.6987 4.9373 -1.9591 41 1 9.9801 3.3870 -0.9200 42 1 9.8007 3.2678 -3.3405 43 1 9.7043 5.0452 -3.3411 44 1 11.6611 5.5128 -1.0258 45 1 13.1388 5.5933 -2.0153 46 1 11.6531 6.4030 -2.5672 47 1 11.8865 2.1309 -2.5651 48 1 13.2751 3.0981 -2.0140 49 1 11.7975 3.0181 -1.0246 50 1 11.8753 3.3811 -4.7290 51 1 11.7781 5.1583 -4.7293 52 1 14.2794 4.4036 -7.3246 53 1 6.0606 1.8222 -0.0014 RHF calculation, no. of doubly occupied orbitals= 62 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 ZINC000135955250.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 12:38:09 Heat of formation + Delta-G solvation = -50.521679 kcal Electronic energy + Delta-G solvation = -25851.687577 eV Core-core repulsion = 22301.098688 eV Total energy + Delta-G solvation = -3550.588888 eV No. of doubly occupied orbitals = 62 Molecular weight (most abundant/longest-lived isotopes) = 319.225 amu Computer time = 0.75 seconds Orbital eigenvalues (eV) -40.44863 -38.33128 -37.54456 -35.04744 -34.32072 -32.69063 -31.75751 -30.38044 -28.31422 -26.99186 -26.77436 -26.28950 -25.01567 -23.28187 -22.68802 -22.17152 -21.76653 -20.79284 -18.10024 -17.69317 -16.67569 -16.47849 -16.26330 -16.18489 -15.49983 -15.03453 -14.57010 -14.50697 -14.39689 -14.04254 -13.88225 -13.43662 -13.30074 -13.03594 -12.80264 -12.65733 -12.56768 -12.36256 -12.22165 -11.96494 -11.77217 -11.71675 -11.52675 -11.41647 -11.17306 -10.98199 -10.96637 -10.92017 -10.76062 -10.71664 -10.45920 -10.22446 -10.07750 -9.64517 -9.07516 -8.94086 -8.77533 -8.40630 -8.29365 -8.05350 -5.93681 -3.93671 1.09535 1.24769 2.83050 3.34320 3.42085 3.45710 3.53171 4.31969 4.38612 4.40121 4.51791 4.60419 4.70137 4.73332 4.85216 4.91919 4.99328 5.03838 5.13281 5.18454 5.24593 5.31474 5.42155 5.45845 5.47152 5.56048 5.61822 5.69534 5.72405 5.77261 5.82557 5.98674 6.01244 6.05973 6.11353 6.22340 6.30530 6.37877 6.47681 6.55307 6.56436 6.70268 6.82936 6.86745 7.16542 7.24810 7.26263 7.30095 7.43834 7.71003 7.75074 7.89337 8.06964 8.51546 9.12083 9.69088 11.18025 Molecular weight = 319.23amu Principal moments of inertia in cm(-1) A = 0.023701 B = 0.001755 C = 0.001697 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1181.116694 B =15947.303689 C =16498.818740 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.150 4.150 2 C -0.125 4.125 3 C 0.059 3.941 4 O -0.317 6.317 5 C 0.130 3.870 6 C -0.217 4.217 7 C -0.079 4.079 8 C -0.152 4.152 9 C -0.036 4.036 10 C -0.080 4.080 11 C 0.064 3.936 12 N -0.687 5.687 13 C 0.070 3.930 14 C -0.059 4.059 15 C -0.116 4.116 16 C -0.129 4.129 17 C 0.033 3.967 18 C -0.506 4.506 19 H 0.060 0.940 20 C 0.054 3.946 21 N -0.898 5.898 22 Si 0.888 3.112 23 H -0.273 1.273 24 H -0.286 1.286 25 H -0.286 1.286 26 C -0.150 4.150 27 H 0.057 0.943 28 H 0.058 0.942 29 H 0.064 0.936 30 H 0.074 0.926 31 H 0.073 0.927 32 H 0.061 0.939 33 H 0.061 0.939 34 H 0.124 0.876 35 H 0.124 0.876 36 H 0.126 0.874 37 H 0.084 0.916 38 H 0.072 0.928 39 H 0.027 0.973 40 H 0.071 0.929 41 H 0.338 0.662 42 H 0.023 0.977 43 H 0.065 0.935 44 H 0.042 0.958 45 H 0.054 0.946 46 H 0.039 0.961 47 H 0.039 0.961 48 H 0.064 0.936 49 H 0.033 0.967 50 H 0.012 0.988 51 H 0.015 0.985 52 H 0.258 0.742 53 H 0.129 0.871 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -26.042 -4.170 15.806 30.748 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 -0.207 4.207 2 C -0.162 4.162 3 C -0.016 4.016 4 O -0.231 6.231 5 C 0.085 3.915 6 C -0.235 4.235 7 C -0.097 4.097 8 C -0.170 4.170 9 C -0.036 4.036 10 C -0.118 4.118 11 C -0.065 4.065 12 N -0.319 5.319 13 C -0.058 4.058 14 C -0.060 4.060 15 C -0.173 4.173 16 C -0.186 4.186 17 C -0.004 4.004 18 C -0.544 4.544 19 H 0.078 0.922 20 C -0.147 4.147 21 N -0.538 5.538 22 Si 0.716 3.284 23 H -0.198 1.198 24 H -0.212 1.212 25 H -0.212 1.212 26 C -0.168 4.168 27 H 0.076 0.924 28 H 0.077 0.923 29 H 0.083 0.917 30 H 0.093 0.907 31 H 0.092 0.908 32 H 0.079 0.921 33 H 0.079 0.921 34 H 0.142 0.858 35 H 0.142 0.858 36 H 0.144 0.856 37 H 0.103 0.897 38 H 0.090 0.910 39 H 0.045 0.955 40 H 0.089 0.911 41 H 0.156 0.844 42 H 0.041 0.959 43 H 0.084 0.916 44 H 0.061 0.939 45 H 0.073 0.927 46 H 0.058 0.942 47 H 0.059 0.941 48 H 0.083 0.917 49 H 0.052 0.948 50 H 0.031 0.969 51 H 0.033 0.967 52 H 0.067 0.933 53 H 0.147 0.853 Dipole moment (debyes) X Y Z Total from point charges -25.922 -3.684 15.685 30.522 hybrid contribution 0.587 -0.709 -0.541 1.068 sum -25.335 -4.392 15.144 29.841 Atomic orbital electron populations 1.21690 0.94219 1.02606 1.02200 1.21490 0.96045 0.94839 1.03836 1.22863 0.78567 0.98822 1.01362 1.86053 1.21206 1.27165 1.88698 1.18954 0.92215 0.84008 0.96337 1.21195 0.99806 0.92520 1.10007 1.20926 0.94643 0.96888 0.97246 1.21021 0.93628 0.98285 1.04090 1.19705 0.95865 0.92058 0.95999 1.20622 0.89545 1.03699 0.97885 1.21880 0.89178 1.00486 0.94963 1.60585 1.04289 1.51233 1.15793 1.22100 0.96543 0.99626 0.87553 1.20637 0.91042 0.95086 0.99190 1.21596 1.00899 0.96431 0.98360 1.21769 1.02127 0.97343 0.97387 1.19129 0.95617 0.96903 0.88799 1.21286 0.91757 1.49206 0.92147 0.92216 1.25025 0.98177 0.95750 0.95717 1.69980 1.35150 1.51487 0.97161 0.86604 0.86324 0.77466 0.78014 1.19763 1.21224 1.21181 1.20329 0.91222 0.98357 1.06925 0.92384 0.92338 0.91657 0.90728 0.90796 0.92110 0.92062 0.85827 0.85848 0.85643 0.89707 0.90966 0.95521 0.91081 0.84361 0.95895 0.91621 0.93860 0.92730 0.94217 0.94136 0.91731 0.94760 0.96935 0.96686 0.93253 0.85327 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 12. 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 -0.61 9.91 37.15 0.37 -0.24 16 2 C -0.12 -0.72 6.30 -26.74 -0.17 -0.89 16 3 C 0.06 0.42 4.74 37.16 0.18 0.60 16 4 O -0.32 -3.32 10.14 -19.43 -0.20 -3.52 16 5 C 0.13 1.41 6.69 -39.22 -0.26 1.15 16 6 C -0.22 -2.04 9.04 -39.43 -0.36 -2.39 16 7 C -0.08 -0.72 10.04 -39.60 -0.40 -1.12 16 8 C -0.15 -1.51 9.70 -39.56 -0.38 -1.90 16 9 C -0.04 -0.38 5.13 -104.64 -0.54 -0.92 16 10 C -0.08 -0.84 5.60 -27.88 -0.16 -1.00 16 11 C 0.06 0.81 5.67 -3.83 -0.02 0.79 16 12 N -0.69 -10.00 5.71 -113.78 -0.65 -10.65 16 13 C 0.07 1.24 4.65 -3.82 -0.02 1.22 16 14 C -0.06 -1.19 0.60 -154.51 -0.09 -1.29 16 15 C -0.12 -2.26 8.06 37.16 0.30 -1.96 16 16 C -0.13 -2.42 7.89 37.16 0.29 -2.12 16 17 C 0.03 0.84 4.04 -27.89 -0.11 0.73 16 18 C -0.51 -13.96 7.65 -34.44 -0.26 -14.22 16 19 H 0.06 1.61 5.68 -52.49 -0.30 1.31 16 20 C 0.05 1.53 5.46 -17.82 -0.10 1.44 16 21 N -0.90 -27.08 13.29 55.43 0.74 -26.35 16 22 Si 0.89 21.74 29.54 -169.99 -5.02 16.72 16 23 H -0.27 -6.52 7.11 56.52 0.40 -6.12 16 24 H -0.29 -6.97 7.11 56.52 0.40 -6.57 16 25 H -0.29 -6.97 7.11 56.52 0.40 -6.57 16 26 C -0.15 -1.67 9.64 -39.43 -0.38 -2.05 16 27 H 0.06 0.21 8.14 -51.93 -0.42 -0.21 16 28 H 0.06 0.22 8.14 -51.93 -0.42 -0.20 16 29 H 0.06 0.23 8.14 -51.93 -0.42 -0.19 16 30 H 0.07 0.46 8.14 -51.93 -0.42 0.04 16 31 H 0.07 0.43 8.14 -51.93 -0.42 0.01 16 32 H 0.06 0.37 7.68 -51.93 -0.40 -0.03 16 33 H 0.06 0.39 7.65 -51.93 -0.40 0.00 16 34 H 0.12 0.90 6.30 -52.48 -0.33 0.57 16 35 H 0.12 0.84 8.06 -52.49 -0.42 0.41 16 36 H 0.13 1.10 8.06 -52.49 -0.42 0.67 16 37 H 0.08 0.88 8.09 -51.93 -0.42 0.46 16 38 H 0.07 0.71 8.08 -51.93 -0.42 0.29 16 39 H 0.03 0.35 8.14 -51.93 -0.42 -0.07 16 40 H 0.07 0.93 8.14 -51.93 -0.42 0.51 16 41 H 0.34 4.67 6.77 -39.29 -0.27 4.40 16 42 H 0.02 0.41 8.14 -51.93 -0.42 -0.01 16 43 H 0.07 1.20 8.14 -51.93 -0.42 0.78 16 44 H 0.04 0.76 7.60 -51.93 -0.39 0.36 16 45 H 0.05 1.14 6.62 -51.93 -0.34 0.79 16 46 H 0.04 0.78 8.14 -51.93 -0.42 0.36 16 47 H 0.04 0.75 8.14 -51.93 -0.42 0.33 16 48 H 0.06 1.31 6.62 -51.93 -0.34 0.97 16 49 H 0.03 0.54 6.57 -51.93 -0.34 0.20 16 50 H 0.01 0.34 8.14 -51.93 -0.42 -0.08 16 51 H 0.01 0.41 8.14 -51.93 -0.42 -0.01 16 52 H 0.26 7.37 8.31 -40.82 -0.34 7.03 16 53 H 0.13 1.37 8.06 -52.49 -0.42 0.94 16 LS Contribution 416.79 15.07 6.28 6.28 Total: -1.00 -30.50 416.79 -10.81 -41.32 By element: Atomic # 1 Polarization: 10.21 SS G_CDS: -9.85 Total: 0.36 kcal Atomic # 6 Polarization: -22.05 SS G_CDS: -2.11 Total: -24.16 kcal Atomic # 7 Polarization: -37.08 SS G_CDS: 0.09 Total: -37.00 kcal Atomic # 8 Polarization: -3.32 SS G_CDS: -0.20 Total: -3.52 kcal Atomic # 14 Polarization: 21.74 SS G_CDS: -5.02 Total: 16.72 kcal Total LS contribution 6.28 Total: 6.28 kcal Total: -30.50 -10.81 -41.32 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. ZINC000135955250.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 -9.204 kcal (2) G-P(sol) polarization free energy of solvation -30.504 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -39.708 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.814 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -41.318 kcal (6) G-S(sol) free energy of system = (1) + (5) -50.522 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.75 seconds