Wall clock time and date at job start Sat Apr 11 2020 06:11:41 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 1.52997 * 1 3 3 H 1.08998 * 109.47533 * 2 1 4 4 C 1.50706 * 109.47238 * 240.00493 * 2 1 3 5 5 H 1.07998 * 119.99629 * 239.99904 * 4 2 1 6 6 C 1.37875 * 119.99955 * 59.99333 * 4 2 1 7 7 N 1.31510 * 120.00308 * 0.02562 * 6 4 2 8 8 Si 1.86800 * 119.99908 * 180.02562 * 6 4 2 9 9 H 1.48503 * 109.46848 * 60.00326 * 8 6 4 10 10 H 1.48500 * 109.47035 * 180.02562 * 8 6 4 11 11 H 1.48503 * 109.47237 * 300.00475 * 8 6 4 12 12 N 1.46500 * 109.47473 * 120.00128 * 2 1 3 13 13 C 1.46502 * 119.99711 * 60.00297 * 12 2 1 14 14 C 1.34769 * 120.00163 * 240.00131 * 12 2 1 15 15 O 1.21279 * 120.00303 * 0.02562 * 14 12 2 16 16 C 1.50701 * 119.99833 * 179.97438 * 14 12 2 17 17 C 1.53004 * 109.46861 * 180.02562 * 16 14 12 18 18 H 1.09001 * 109.47590 * 304.99586 * 17 16 14 19 19 N 1.46498 * 109.47419 * 65.00085 * 17 16 14 20 20 C 1.34778 * 120.00074 * 205.00078 * 19 17 16 21 21 O 1.21504 * 120.00181 * 359.97438 * 20 19 17 22 22 O 1.34635 * 119.99933 * 179.97438 * 20 19 17 23 23 C 1.45199 * 117.00153 * 179.97438 * 22 20 19 24 24 C 1.53006 * 109.46477 * 60.00319 * 23 22 20 25 25 C 1.52998 * 109.47366 * 179.97438 * 23 22 20 26 26 C 1.52997 * 109.47292 * 300.00591 * 23 22 20 27 27 C 1.53005 * 109.47053 * 185.00074 * 17 16 14 28 28 C 1.52999 * 117.49961 * 248.74832 * 27 17 16 29 29 C 1.52994 * 117.49977 * 180.08846 * 27 17 16 30 30 H 1.09002 * 109.47153 * 299.99629 * 1 2 3 31 31 H 1.09001 * 109.46832 * 179.97438 * 1 2 3 32 32 H 1.09004 * 109.47261 * 59.99801 * 1 2 3 33 33 H 0.96998 * 120.00365 * 179.97438 * 7 6 4 34 34 H 1.08993 * 109.47565 * 90.00263 * 13 12 2 35 35 H 1.09007 * 109.46761 * 210.00296 * 13 12 2 36 36 H 1.09002 * 109.46792 * 329.99948 * 13 12 2 37 37 H 1.09000 * 109.47080 * 299.99533 * 16 14 12 38 38 H 1.08993 * 109.47251 * 60.00389 * 16 14 12 39 39 H 0.97000 * 119.99543 * 24.99728 * 19 17 16 40 40 H 1.08995 * 109.47702 * 60.00319 * 24 23 22 41 41 H 1.09004 * 109.46665 * 180.02562 * 24 23 22 42 42 H 1.09001 * 109.47157 * 299.99586 * 24 23 22 43 43 H 1.09003 * 109.46973 * 60.00350 * 25 23 22 44 44 H 1.09002 * 109.47467 * 180.02562 * 25 23 22 45 45 H 1.08994 * 109.47440 * 300.00660 * 25 23 22 46 46 H 1.08995 * 109.47153 * 59.99624 * 26 23 22 47 47 H 1.09002 * 109.46879 * 179.97438 * 26 23 22 48 48 H 1.09003 * 109.46636 * 299.99399 * 26 23 22 49 49 H 1.09001 * 115.54992 * 34.41379 * 27 17 16 50 50 H 1.09003 * 117.49850 * 359.97438 * 28 27 17 51 51 H 1.08996 * 117.50019 * 145.01807 * 28 27 17 52 52 H 1.09004 * 117.50111 * 214.98038 * 29 27 17 53 53 H 1.09004 * 117.50322 * 359.97357 * 29 27 17 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 1 1.8934 1.0276 0.0000 4 6 2.0324 -0.7103 -1.2306 5 1 2.6533 -1.5884 -1.1315 6 6 1.6992 -0.2392 -2.4828 7 7 0.9434 0.8302 -2.6034 8 14 2.3213 -1.1201 -4.0080 9 1 1.8258 -2.5200 -4.0078 10 1 1.8268 -0.4196 -5.2205 11 1 3.8063 -1.1207 -4.0083 12 7 2.0184 -0.6906 1.1961 13 6 1.6645 -2.0933 1.4279 14 6 2.7932 -0.0357 2.0832 15 8 3.0858 1.1256 1.8917 16 6 3.2951 -0.7460 3.3139 17 6 4.1447 0.2158 4.1471 18 1 4.9415 0.6269 3.5273 19 7 3.3019 1.3057 4.6452 20 6 3.8526 2.4968 4.9528 21 8 5.0480 2.6666 4.8173 22 8 3.0779 3.4985 5.4101 23 6 3.7388 4.7532 5.7218 24 6 4.4161 5.2991 4.4631 25 6 2.7048 5.7636 6.2228 26 6 4.7917 4.5194 6.8069 27 6 4.7561 -0.5376 5.3300 28 6 4.2469 -0.1879 6.7298 29 6 5.6443 0.2561 6.2902 30 1 -0.3633 0.5138 0.8900 31 1 -0.3633 -1.0277 -0.0005 32 1 -0.3634 0.5139 -0.8900 33 1 0.7093 1.1619 -3.4844 34 1 2.4158 -2.7377 0.9716 35 1 1.6239 -2.2853 2.5001 36 1 0.6905 -2.3002 0.9845 37 1 2.4471 -1.0881 3.9072 38 1 3.9005 -1.6025 3.0176 39 1 2.3476 1.1700 4.7537 40 1 3.6661 5.4658 3.6900 41 1 4.9126 6.2409 4.6971 42 1 5.1527 4.5795 4.1057 43 1 2.2218 5.3749 7.1194 44 1 3.2008 6.7057 6.4563 45 1 1.9550 5.9300 5.4495 46 1 5.5282 3.7998 6.4495 47 1 5.2880 5.4613 7.0405 48 1 4.3090 4.1305 7.7036 49 1 5.0254 -1.5762 5.1375 50 1 3.4765 0.5794 6.8079 51 1 4.1815 -0.9961 7.4581 52 1 6.4978 -0.2603 6.7296 53 1 5.7935 1.3150 6.0790 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 ZINC000751675144.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 06:11:41 Heat of formation + Delta-G solvation = -90.370294 kcal Electronic energy + Delta-G solvation = -31922.527740 eV Core-core repulsion = 27795.646731 eV Total energy + Delta-G solvation = -4126.881009 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.76 seconds Orbital eigenvalues (eV) -40.85730 -39.39803 -38.19486 -36.30539 -35.37873 -34.34052 -33.59066 -32.88452 -30.93003 -29.13605 -27.47452 -27.35852 -26.15477 -25.26488 -24.84299 -22.68488 -22.32354 -21.02687 -19.98542 -19.91740 -18.34053 -17.95260 -16.87444 -16.58317 -16.46217 -15.93545 -15.67858 -15.22573 -15.19914 -14.62422 -14.47928 -14.25217 -14.12429 -13.59010 -13.40768 -12.89860 -12.71183 -12.55593 -12.54828 -12.23405 -12.14845 -12.00585 -11.88625 -11.79222 -11.77382 -11.53763 -11.52111 -11.42057 -11.26159 -11.24926 -11.05345 -10.82143 -10.69274 -10.38128 -10.27977 -10.26301 -10.16349 -10.01122 -9.79679 -9.19274 -9.00106 -8.83329 -8.42191 -7.58351 -6.07030 -4.15188 2.30494 3.06499 3.27616 3.32879 3.33388 3.39892 3.75357 3.92717 4.25230 4.39212 4.66393 4.69289 4.73219 4.82148 4.88199 4.98096 5.07105 5.23728 5.26976 5.35289 5.38817 5.42756 5.49838 5.58922 5.60893 5.63054 5.66808 5.74952 5.76716 5.86118 5.90944 5.94489 6.01695 6.04679 6.12435 6.20957 6.28030 6.31478 6.39428 6.56815 6.70425 6.75034 6.80590 7.04972 7.42579 7.51787 7.61566 7.71590 8.01298 8.19975 8.53331 8.59625 8.83554 9.06108 9.51490 10.98152 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.013228 B = 0.003066 C = 0.002720 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2116.136166 B = 9129.118936 C =10290.724445 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.147 4.147 2 C 0.259 3.741 3 H 0.063 0.937 4 C -0.526 4.526 5 H 0.058 0.942 6 C 0.065 3.935 7 N -0.888 5.888 8 Si 0.898 3.102 9 H -0.277 1.277 10 H -0.286 1.286 11 H -0.277 1.277 12 N -0.594 5.594 13 C 0.086 3.914 14 C 0.498 3.502 15 O -0.542 6.542 16 C -0.148 4.148 17 C 0.211 3.789 18 H 0.104 0.896 19 N -0.690 5.690 20 C 0.660 3.340 21 O -0.567 6.567 22 O -0.367 6.367 23 C 0.138 3.862 24 C -0.184 4.184 25 C -0.141 4.141 26 C -0.181 4.181 27 C -0.170 4.170 28 C -0.178 4.178 29 C -0.184 4.184 30 H 0.010 0.990 31 H 0.029 0.971 32 H 0.093 0.907 33 H 0.264 0.736 34 H 0.048 0.952 35 H 0.052 0.948 36 H 0.072 0.928 37 H 0.094 0.906 38 H 0.106 0.894 39 H 0.402 0.598 40 H 0.061 0.939 41 H 0.066 0.934 42 H 0.090 0.910 43 H 0.064 0.936 44 H 0.078 0.922 45 H 0.067 0.933 46 H 0.088 0.912 47 H 0.067 0.933 48 H 0.057 0.943 49 H 0.112 0.888 50 H 0.092 0.908 51 H 0.088 0.912 52 H 0.086 0.914 53 H 0.119 0.881 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 3.475 0.406 20.312 20.612 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 -0.205 4.205 2 C 0.159 3.841 3 H 0.080 0.920 4 C -0.565 4.565 5 H 0.076 0.924 6 C -0.138 4.138 7 N -0.526 5.526 8 Si 0.726 3.274 9 H -0.203 1.203 10 H -0.212 1.212 11 H -0.202 1.202 12 N -0.326 5.326 13 C -0.058 4.058 14 C 0.284 3.716 15 O -0.420 6.420 16 C -0.189 4.189 17 C 0.107 3.893 18 H 0.121 0.879 19 N -0.347 5.347 20 C 0.414 3.586 21 O -0.457 6.457 22 O -0.282 6.282 23 C 0.101 3.899 24 C -0.241 4.241 25 C -0.198 4.198 26 C -0.239 4.239 27 C -0.189 4.189 28 C -0.215 4.215 29 C -0.220 4.220 30 H 0.029 0.971 31 H 0.048 0.952 32 H 0.111 0.889 33 H 0.074 0.926 34 H 0.067 0.933 35 H 0.070 0.930 36 H 0.091 0.909 37 H 0.112 0.888 38 H 0.124 0.876 39 H 0.236 0.764 40 H 0.081 0.919 41 H 0.085 0.915 42 H 0.109 0.891 43 H 0.083 0.917 44 H 0.097 0.903 45 H 0.086 0.914 46 H 0.107 0.893 47 H 0.086 0.914 48 H 0.076 0.924 49 H 0.130 0.870 50 H 0.110 0.890 51 H 0.107 0.893 52 H 0.105 0.895 53 H 0.137 0.863 Dipole moment (debyes) X Y Z Total from point charges 4.111 1.312 19.982 20.442 hybrid contribution -0.199 -0.785 -0.932 1.235 sum 3.912 0.526 19.049 19.454 Atomic orbital electron populations 1.22092 0.98344 0.99271 1.00794 1.18904 0.90736 0.94491 0.79993 0.91960 1.21286 1.31855 1.12984 0.90357 0.92388 1.24891 0.94953 0.94975 0.98961 1.69865 1.36338 1.22563 1.23846 0.86562 0.79268 0.79547 0.82039 1.20257 1.21180 1.20243 1.48240 1.49091 1.11584 1.23656 1.21560 1.01651 0.83337 0.99257 1.20285 0.79581 0.87296 0.84402 1.90703 1.57828 1.16835 1.76652 1.22040 1.01298 0.99586 0.95936 1.20131 0.92636 0.84356 0.92158 0.87861 1.44546 1.11865 1.09696 1.68545 1.17898 0.83755 0.80780 0.76153 1.90801 1.14220 1.82066 1.58594 1.86290 1.41612 1.21950 1.78313 1.21998 0.92592 0.79923 0.95409 1.22516 1.02353 1.02305 0.96961 1.21853 0.98759 0.97229 1.01942 1.22511 0.99800 1.03671 0.97878 1.22813 1.04981 1.00022 0.91131 1.22916 0.98324 1.03483 0.96758 1.23360 0.93229 1.02906 1.02523 0.97056 0.95154 0.88864 0.92647 0.93320 0.92958 0.90934 0.88795 0.87573 0.76360 0.91947 0.91524 0.89128 0.91697 0.90348 0.91381 0.89290 0.91412 0.92429 0.86961 0.88954 0.89316 0.89515 0.86302 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 -3.46 8.95 37.16 0.33 -3.13 16 2 C 0.26 6.52 2.64 -69.08 -0.18 6.34 16 3 H 0.06 1.85 6.90 -51.93 -0.36 1.49 16 4 C -0.53 -14.16 8.37 -34.44 -0.29 -14.44 16 5 H 0.06 1.53 7.65 -52.49 -0.40 1.13 16 6 C 0.06 1.76 5.30 -17.82 -0.09 1.67 16 7 N -0.89 -25.17 11.32 55.43 0.63 -24.54 16 8 Si 0.90 21.07 29.54 -169.99 -5.02 16.05 16 9 H -0.28 -6.33 7.11 56.52 0.40 -5.92 16 10 H -0.29 -6.68 7.11 56.52 0.40 -6.28 16 11 H -0.28 -6.53 7.11 56.52 0.40 -6.13 16 12 N -0.59 -12.08 2.75 -175.26 -0.48 -12.56 16 13 C 0.09 1.35 9.48 59.85 0.57 1.91 16 14 C 0.50 9.60 7.54 -10.99 -0.08 9.52 16 15 O -0.54 -12.83 14.68 5.56 0.08 -12.74 16 16 C -0.15 -1.93 3.78 -27.88 -0.11 -2.04 16 17 C 0.21 2.87 1.99 -67.93 -0.14 2.74 16 18 H 0.10 1.75 7.39 -51.93 -0.38 1.37 16 19 N -0.69 -9.72 2.76 -58.73 -0.16 -9.88 16 20 C 0.66 10.28 6.89 54.06 0.37 10.65 16 21 O -0.57 -9.58 8.91 -19.28 -0.17 -9.75 16 22 O -0.37 -5.35 9.94 -40.31 -0.40 -5.75 16 23 C 0.14 1.68 1.13 -90.62 -0.10 1.57 16 24 C -0.18 -2.41 8.37 37.16 0.31 -2.10 16 25 C -0.14 -1.32 8.85 37.16 0.33 -0.99 16 26 C -0.18 -1.97 8.37 37.16 0.31 -1.66 16 27 C -0.17 -1.86 5.71 -90.62 -0.52 -2.38 16 28 C -0.18 -1.82 9.74 -26.70 -0.26 -2.08 16 29 C -0.18 -2.12 9.82 -26.70 -0.26 -2.38 16 30 H 0.01 0.23 8.14 -51.93 -0.42 -0.19 16 31 H 0.03 0.65 6.66 -51.93 -0.35 0.31 16 32 H 0.09 2.44 6.07 -51.93 -0.32 2.12 16 33 H 0.26 7.14 8.31 -40.82 -0.34 6.80 16 34 H 0.05 0.74 8.14 -51.93 -0.42 0.32 16 35 H 0.05 0.61 6.44 -51.92 -0.33 0.27 16 36 H 0.07 1.17 6.43 -51.93 -0.33 0.84 16 37 H 0.09 0.99 7.40 -51.93 -0.38 0.60 16 38 H 0.11 1.19 8.11 -51.93 -0.42 0.76 16 39 H 0.40 5.18 8.71 -40.82 -0.36 4.82 16 40 H 0.06 0.87 8.14 -51.93 -0.42 0.44 16 41 H 0.07 0.70 8.14 -51.93 -0.42 0.28 16 42 H 0.09 1.42 5.88 -51.93 -0.31 1.12 16 43 H 0.06 0.56 8.14 -51.93 -0.42 0.14 16 44 H 0.08 0.57 8.14 -51.93 -0.42 0.15 16 45 H 0.07 0.67 8.14 -51.93 -0.42 0.24 16 46 H 0.09 1.15 5.88 -51.93 -0.31 0.84 16 47 H 0.07 0.60 8.14 -51.93 -0.42 0.18 16 48 H 0.06 0.58 8.14 -51.93 -0.42 0.15 16 49 H 0.11 1.04 8.11 -51.93 -0.42 0.62 16 50 H 0.09 1.01 6.67 -51.93 -0.35 0.67 16 51 H 0.09 0.78 8.14 -51.93 -0.42 0.35 16 52 H 0.09 0.88 8.14 -51.93 -0.42 0.46 16 53 H 0.12 1.65 5.01 -51.93 -0.26 1.39 16 LS Contribution 409.33 15.07 6.17 6.17 Total: -1.00 -32.22 409.33 -8.22 -40.45 By element: Atomic # 1 Polarization: 18.40 SS G_CDS: -9.06 Total: 9.35 kcal Atomic # 6 Polarization: 3.02 SS G_CDS: 0.19 Total: 3.21 kcal Atomic # 7 Polarization: -46.96 SS G_CDS: -0.02 Total: -46.98 kcal Atomic # 8 Polarization: -27.76 SS G_CDS: -0.49 Total: -28.25 kcal Atomic # 14 Polarization: 21.07 SS G_CDS: -5.02 Total: 16.05 kcal Total LS contribution 6.17 Total: 6.17 kcal Total: -32.22 -8.22 -40.45 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. ZINC000751675144.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 -49.924 kcal (2) G-P(sol) polarization free energy of solvation -32.222 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -82.147 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.224 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.446 kcal (6) G-S(sol) free energy of system = (1) + (5) -90.370 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.76 seconds