Wall clock time and date at job start Sat Apr 11 2020 06:15:06 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 1.52996 * 1 3 3 C 1.53003 * 109.47135 * 2 1 4 4 H 1.08994 * 109.48065 * 304.99975 * 3 2 1 5 5 C 1.53091 * 109.48079 * 184.97640 * 3 2 1 6 6 C 1.53175 * 109.16429 * 182.39708 * 5 3 2 7 7 H 1.08995 * 109.54718 * 297.11446 * 6 5 3 8 8 C 1.50699 * 109.54526 * 176.84728 * 6 5 3 9 9 O 1.21285 * 119.99770 * 359.97438 * 8 6 5 10 10 N 1.34778 * 119.99899 * 180.02562 * 8 6 5 11 11 C 1.46502 * 119.99893 * 174.69417 * 10 8 6 12 12 C 1.52997 * 109.54259 * 304.13453 * 11 10 8 13 13 N 1.46499 * 109.46855 * 305.57756 * 12 11 10 14 14 C 1.36937 * 119.99841 * 175.02937 * 13 12 11 15 15 H 1.07991 * 120.00389 * 359.97438 * 14 13 12 16 16 C 1.38819 * 119.99603 * 179.97438 * 14 13 12 17 17 N 1.31612 * 120.00249 * 359.97438 * 16 14 13 18 18 Si 1.86804 * 119.99692 * 179.97438 * 16 14 13 19 19 H 1.48503 * 109.46982 * 359.97438 * 18 16 14 20 20 H 1.48500 * 109.47160 * 119.99686 * 18 16 14 21 21 H 1.48500 * 109.47236 * 240.00042 * 18 16 14 22 22 C 1.53172 * 109.54239 * 183.95329 * 11 10 8 23 23 C 1.53283 * 109.06531 * 297.02715 * 22 11 10 24 24 O 1.42902 * 109.46166 * 302.44659 * 23 22 11 25 25 C 1.42906 * 114.09665 * 61.15645 * 24 23 22 26 26 C 1.53091 * 109.41640 * 298.84068 * 25 24 23 27 27 C 1.53181 * 109.03685 * 56.98036 * 6 5 3 28 28 C 1.53096 * 109.16289 * 303.02055 * 27 6 5 29 29 O 1.42904 * 109.48946 * 65.02767 * 3 2 1 30 30 H 1.09003 * 109.47511 * 300.00022 * 1 2 3 31 31 H 1.08999 * 109.47297 * 59.99994 * 1 2 3 32 32 H 1.08996 * 109.47570 * 179.97438 * 1 2 3 33 33 H 1.08997 * 109.47107 * 240.00185 * 2 1 3 34 34 H 1.08999 * 109.47297 * 120.00006 * 2 1 3 35 35 H 1.09000 * 109.52213 * 302.30155 * 5 3 2 36 36 H 1.08998 * 109.52130 * 62.42978 * 5 3 2 37 37 H 0.96996 * 119.99871 * 354.68476 * 10 8 6 38 38 H 1.08992 * 109.47338 * 65.57568 * 12 11 10 39 39 H 1.09000 * 109.47218 * 185.57850 * 12 11 10 40 40 H 0.96995 * 120.00271 * 355.02238 * 13 12 11 41 41 H 0.97002 * 120.00177 * 179.97438 * 17 16 14 42 42 H 1.08991 * 109.52578 * 57.02126 * 22 11 10 43 43 H 1.09001 * 109.52248 * 177.21144 * 22 11 10 44 44 H 1.09001 * 109.46125 * 182.44977 * 23 22 11 45 45 H 1.08999 * 109.46748 * 62.44969 * 23 22 11 46 46 H 1.09004 * 109.47883 * 178.85540 * 25 24 23 47 47 H 1.09007 * 109.48731 * 58.82970 * 25 24 23 48 48 H 1.09002 * 109.52056 * 297.70384 * 26 25 24 49 49 H 1.09002 * 109.52291 * 177.51064 * 26 25 24 50 50 H 1.09008 * 109.52201 * 62.92290 * 27 6 5 51 51 H 1.08998 * 109.52549 * 183.05417 * 27 6 5 52 52 H 1.08997 * 109.48417 * 177.58942 * 28 27 6 53 53 H 1.08996 * 109.48171 * 297.62541 * 28 27 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 2.0400 1.4425 0.0000 4 1 1.6055 1.9817 -0.8417 5 6 3.5657 1.4446 -0.1252 6 6 4.0733 2.8885 -0.0642 7 1 3.6795 3.4496 -0.9116 8 6 5.5796 2.8957 -0.1089 9 8 6.1891 1.8497 -0.1818 10 7 6.2495 4.0645 -0.0667 11 6 7.7126 4.0680 0.0072 12 6 8.1657 3.2517 1.2193 13 7 7.5088 3.7623 2.4251 14 6 7.6822 3.1215 3.6228 15 1 8.3029 2.2396 3.6785 16 6 7.0602 3.6058 4.7654 17 7 6.3042 4.6810 4.6977 18 14 7.2962 2.7312 6.3992 19 1 8.1848 1.5568 6.2081 20 1 7.9121 3.6649 7.3760 21 1 5.9788 2.2764 6.9120 22 6 8.2154 5.5085 0.1425 23 6 7.8235 6.2956 -1.1131 24 8 8.3682 5.6527 -2.2673 25 6 7.8968 4.3189 -2.4692 26 6 8.2918 3.4525 -1.2704 27 6 3.5964 3.5310 1.2420 28 6 2.0694 3.4484 1.3144 29 8 1.6627 2.0816 1.2212 30 1 -0.3634 0.5138 0.8900 31 1 -0.3634 0.5138 -0.8900 32 1 -0.3634 -1.0276 -0.0005 33 1 1.8933 -0.5138 -0.8900 34 1 1.8933 -0.5138 0.8900 35 1 3.9992 0.8712 0.6942 36 1 3.8538 0.9961 -1.0760 37 1 5.7628 4.9033 -0.0855 38 1 7.8963 2.2056 1.0742 39 1 9.2467 3.3364 1.3309 40 1 6.9511 4.5544 2.3751 41 1 5.8692 5.0191 5.4961 42 1 7.7643 5.9708 1.0204 43 1 9.3004 5.5073 0.2473 44 1 8.2159 7.3101 -1.0429 45 1 6.7372 6.3309 -1.1953 46 1 8.3419 3.9094 -3.3761 47 1 6.8113 4.3280 -2.5692 48 1 9.3783 3.4099 -1.1941 49 1 7.8950 2.4458 -1.4020 50 1 4.0305 2.9997 2.0890 51 1 3.9072 4.5754 1.2689 52 1 1.7272 3.8657 2.2614 53 1 1.6352 4.0138 0.4898 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 ZINC001327670556.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 06:15:06 Heat of formation + Delta-G solvation = -133.731203 kcal Electronic energy + Delta-G solvation = -32782.602644 eV Core-core repulsion = 28653.841365 eV Total energy + Delta-G solvation = -4128.761279 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 2.32 seconds Orbital eigenvalues (eV) -40.67175 -39.47747 -38.07021 -35.75903 -34.10913 -33.64614 -33.50970 -31.41443 -31.05332 -30.37875 -29.70975 -26.64912 -25.82079 -23.77252 -23.69480 -23.30635 -22.09125 -21.46691 -20.84924 -19.81662 -18.95594 -17.22671 -17.13289 -16.38826 -16.02485 -15.91654 -15.74376 -15.38291 -14.96873 -14.60098 -14.49846 -14.34438 -14.00387 -13.72314 -13.66036 -13.43085 -13.34632 -13.11479 -12.80077 -12.68421 -12.37614 -12.31236 -11.84092 -11.78771 -11.65869 -11.53760 -11.25892 -11.19897 -11.07680 -10.90605 -10.90357 -10.82434 -10.53541 -10.49782 -10.32332 -10.21289 -10.03058 -9.72085 -9.60466 -9.45076 -9.08644 -8.76566 -8.53938 -6.85796 -5.75380 -3.01028 3.02656 3.44282 3.49147 3.51604 3.53041 3.85358 3.93785 4.60636 4.63084 4.73769 4.86162 4.91403 4.99229 5.02686 5.07968 5.10129 5.13969 5.14588 5.24508 5.30818 5.37484 5.42852 5.46806 5.48763 5.60929 5.71982 5.73316 5.75924 5.77706 5.81327 5.88932 5.93318 5.95871 6.05267 6.07257 6.10002 6.15285 6.24421 6.28140 6.30268 6.38377 6.46912 6.54571 6.58798 6.88533 7.07881 7.24339 7.33992 7.74782 7.89294 8.44197 8.65448 9.56382 10.12966 10.49443 11.47681 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.007055 B = 0.005304 C = 0.003429 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 3968.025156 B = 5277.397945 C = 8163.948040 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.148 4.148 2 C -0.117 4.117 3 C 0.092 3.908 4 H 0.053 0.947 5 C -0.127 4.127 6 C -0.106 4.106 7 H 0.086 0.914 8 C 0.532 3.468 9 O -0.532 6.532 10 N -0.714 5.714 11 C 0.175 3.825 12 C 0.142 3.858 13 N -0.723 5.723 14 C -0.228 4.228 15 H 0.067 0.933 16 C -0.013 4.013 17 N -0.935 5.935 18 Si 0.902 3.098 19 H -0.282 1.282 20 H -0.293 1.293 21 H -0.292 1.292 22 C -0.155 4.155 23 C 0.061 3.939 24 O -0.386 6.386 25 C 0.067 3.933 26 C -0.163 4.163 27 C -0.143 4.143 28 C 0.067 3.933 29 O -0.377 6.377 30 H 0.062 0.938 31 H 0.049 0.951 32 H 0.051 0.949 33 H 0.074 0.926 34 H 0.072 0.928 35 H 0.083 0.917 36 H 0.074 0.926 37 H 0.393 0.607 38 H 0.049 0.951 39 H 0.018 0.982 40 H 0.381 0.619 41 H 0.252 0.748 42 H 0.089 0.911 43 H 0.085 0.915 44 H 0.093 0.907 45 H 0.045 0.955 46 H 0.088 0.912 47 H 0.046 0.954 48 H 0.076 0.924 49 H 0.093 0.907 50 H 0.091 0.909 51 H 0.078 0.922 52 H 0.097 0.903 53 H 0.045 0.955 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -7.500 0.189 -15.527 17.244 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 -0.206 4.206 2 C -0.154 4.154 3 C 0.034 3.966 4 H 0.071 0.929 5 C -0.165 4.165 6 C -0.128 4.128 7 H 0.104 0.896 8 C 0.319 3.681 9 O -0.408 6.408 10 N -0.365 5.365 11 C 0.089 3.911 12 C 0.014 3.986 13 N -0.367 5.367 14 C -0.360 4.360 15 H 0.085 0.915 16 C -0.209 4.209 17 N -0.585 5.585 18 Si 0.734 3.266 19 H -0.207 1.207 20 H -0.220 1.220 21 H -0.220 1.220 22 C -0.193 4.193 23 C -0.015 4.015 24 O -0.305 6.305 25 C -0.010 4.010 26 C -0.202 4.202 27 C -0.181 4.181 28 C -0.010 4.010 29 O -0.296 6.296 30 H 0.081 0.919 31 H 0.068 0.932 32 H 0.070 0.930 33 H 0.092 0.908 34 H 0.091 0.909 35 H 0.102 0.898 36 H 0.093 0.907 37 H 0.227 0.773 38 H 0.067 0.933 39 H 0.036 0.964 40 H 0.215 0.785 41 H 0.062 0.938 42 H 0.108 0.892 43 H 0.104 0.896 44 H 0.111 0.889 45 H 0.064 0.936 46 H 0.106 0.894 47 H 0.064 0.936 48 H 0.095 0.905 49 H 0.112 0.888 50 H 0.110 0.890 51 H 0.097 0.903 52 H 0.115 0.885 53 H 0.063 0.937 Dipole moment (debyes) X Y Z Total from point charges -6.950 -0.713 -15.413 16.922 hybrid contribution -0.244 0.362 1.107 1.190 sum -7.194 -0.350 -14.306 16.017 Atomic orbital electron populations 1.21712 0.95447 1.01303 1.02116 1.21533 0.96400 0.94559 1.02907 1.22134 0.93455 0.93954 0.87053 0.92869 1.22014 0.95172 0.95330 1.04033 1.21342 0.92900 0.98760 0.99756 0.89604 1.20231 0.89241 0.83594 0.75063 1.90616 1.69681 1.31753 1.48746 1.45928 1.06750 1.08269 1.75555 1.20551 0.79336 0.95594 0.95616 1.21064 0.95049 0.97254 0.85228 1.42179 1.58254 1.33170 1.03112 1.19254 1.23706 1.07180 0.85835 0.91452 1.24627 1.00389 0.98185 0.97651 1.69638 1.36405 1.24392 1.28020 0.86177 0.77238 0.78726 0.84473 1.20689 1.22020 1.21959 1.22469 1.03216 0.94725 0.98872 1.22628 0.97427 0.96400 0.85082 1.87895 1.69544 1.27614 1.45418 1.22502 0.98310 0.82361 0.97819 1.22553 1.01788 1.01369 0.94479 1.22142 0.96509 1.02062 0.97378 1.22544 0.93659 0.82805 1.01945 1.87936 1.78379 1.24854 1.38418 0.91898 0.93175 0.92954 0.90751 0.90883 0.89843 0.90732 0.77314 0.93285 0.96394 0.78508 0.93804 0.89214 0.89610 0.88851 0.93629 0.89362 0.93572 0.90527 0.88838 0.89045 0.90331 0.88503 0.93674 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 -1.43 9.81 37.16 0.36 -1.07 16 2 C -0.12 -1.26 5.64 -26.73 -0.15 -1.41 16 3 C 0.09 1.11 2.64 -26.68 -0.07 1.04 16 4 H 0.05 0.57 8.14 -51.93 -0.42 0.15 16 5 C -0.13 -1.75 4.02 -26.59 -0.11 -1.85 16 6 C -0.11 -1.44 2.61 -91.59 -0.24 -1.68 16 7 H 0.09 0.94 8.14 -51.93 -0.42 0.51 16 8 C 0.53 8.67 6.57 -10.99 -0.07 8.59 16 9 O -0.53 -10.37 12.27 5.55 0.07 -10.30 16 10 N -0.71 -10.54 3.64 -47.44 -0.17 -10.72 16 11 C 0.18 2.78 0.32 -131.63 -0.04 2.74 16 12 C 0.14 2.96 4.79 -4.04 -0.02 2.94 16 13 N -0.72 -17.66 5.21 -59.91 -0.31 -17.97 16 14 C -0.23 -6.39 9.99 -15.06 -0.15 -6.54 16 15 H 0.07 1.91 7.83 -52.49 -0.41 1.50 16 16 C -0.01 -0.37 5.50 -17.43 -0.10 -0.47 16 17 N -0.93 -27.20 13.06 55.49 0.72 -26.47 16 18 Si 0.90 22.71 29.55 -169.99 -5.02 17.68 16 19 H -0.28 -6.98 7.11 56.52 0.40 -6.58 16 20 H -0.29 -7.38 7.11 56.52 0.40 -6.98 16 21 H -0.29 -7.43 7.11 56.52 0.40 -7.03 16 22 C -0.15 -2.23 4.84 -26.50 -0.13 -2.35 16 23 C 0.06 0.74 6.67 37.30 0.25 0.98 16 24 O -0.39 -5.16 10.77 -35.23 -0.38 -5.54 16 25 C 0.07 0.83 6.68 37.20 0.25 1.08 16 26 C -0.16 -2.35 4.82 -26.59 -0.13 -2.48 16 27 C -0.14 -2.10 5.31 -26.59 -0.14 -2.24 16 28 C 0.07 0.86 6.84 37.21 0.25 1.12 16 29 O -0.38 -5.36 9.94 -35.23 -0.35 -5.71 16 30 H 0.06 0.68 7.82 -51.93 -0.41 0.27 16 31 H 0.05 0.43 8.14 -51.93 -0.42 0.01 16 32 H 0.05 0.44 8.14 -51.93 -0.42 0.02 16 33 H 0.07 0.69 8.14 -51.93 -0.42 0.27 16 34 H 0.07 0.87 8.14 -51.93 -0.42 0.45 16 35 H 0.08 1.40 8.02 -51.93 -0.42 0.98 16 36 H 0.07 0.96 8.14 -51.93 -0.42 0.53 16 37 H 0.39 5.00 7.10 -40.82 -0.29 4.71 16 38 H 0.05 1.15 6.25 -51.93 -0.32 0.82 16 39 H 0.02 0.39 8.14 -51.93 -0.42 -0.03 16 40 H 0.38 9.44 6.51 -40.82 -0.27 9.18 16 41 H 0.25 7.17 8.31 -40.82 -0.34 6.83 16 42 H 0.09 1.42 7.22 -51.93 -0.37 1.05 16 43 H 0.09 1.27 8.14 -51.93 -0.42 0.85 16 44 H 0.09 0.98 8.14 -51.93 -0.42 0.56 16 45 H 0.05 0.49 7.01 -51.93 -0.36 0.12 16 46 H 0.09 0.96 8.14 -51.93 -0.42 0.54 16 47 H 0.05 0.56 7.75 -51.93 -0.40 0.15 16 48 H 0.08 1.09 8.14 -51.93 -0.42 0.67 16 49 H 0.09 1.49 6.26 -51.93 -0.33 1.17 16 50 H 0.09 1.77 8.14 -51.92 -0.42 1.35 16 51 H 0.08 1.09 7.84 -51.93 -0.41 0.69 16 52 H 0.10 1.22 8.14 -51.93 -0.42 0.80 16 53 H 0.05 0.48 8.14 -51.93 -0.42 0.05 16 LS Contribution 402.87 15.07 6.07 6.07 Total: -1.00 -31.88 402.87 -9.07 -40.94 By element: Atomic # 1 Polarization: 23.07 SS G_CDS: -9.46 Total: 13.61 kcal Atomic # 6 Polarization: -1.37 SS G_CDS: -0.23 Total: -1.60 kcal Atomic # 7 Polarization: -55.40 SS G_CDS: 0.24 Total: -55.16 kcal Atomic # 8 Polarization: -20.89 SS G_CDS: -0.66 Total: -21.55 kcal Atomic # 14 Polarization: 22.71 SS G_CDS: -5.02 Total: 17.68 kcal Total LS contribution 6.07 Total: 6.07 kcal Total: -31.88 -9.07 -40.94 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. ZINC001327670556.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 -92.787 kcal (2) G-P(sol) polarization free energy of solvation -31.877 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -124.665 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.066 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.944 kcal (6) G-S(sol) free energy of system = (1) + (5) -133.731 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 2.32 seconds