Wall clock time and date at job start Tue Mar 9 2021 12:57:53 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= 0 * AM1 - THE AM1 HAMILTONIAN TO BE USED * SM5.42R - SM5.42R CALCULATIONS WILL BE PERFORMED * - CHARGE MODEL 2 WILL BE USED (CM2A) * - THE SOLVENT IS WATER ******************************************************************************* 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 O 1.42895 * 1 3 3 C 1.35957 * 117.00161 * 2 1 4 4 C 1.38909 * 120.06290 * 179.97438 * 3 2 1 5 5 F 1.35096 * 120.04760 * 0.04906 * 4 3 2 6 6 C 1.38332 * 119.90103 * 179.76645 * 4 3 2 7 7 C 1.38250 * 120.03006 * 0.51449 * 6 4 3 8 8 C 1.50709 * 119.93620 * 179.76803 * 7 6 4 9 9 H 1.09002 * 112.84964 * 168.52541 * 8 7 6 10 10 C 1.53782 * 113.60992 * 299.71986 * 8 7 6 11 11 C 1.53788 * 87.07638 * 140.06720 * 10 8 7 12 12 H 1.09005 * 113.60760 * 219.93106 * 11 10 8 13 13 N 1.46490 * 113.61628 * 89.11815 * 11 10 8 14 14 C 1.34779 * 120.00429 * 154.99752 * 13 11 10 15 15 O 1.21627 * 119.99319 * 359.97438 * 14 13 11 16 16 C 1.47284 * 120.00414 * 179.97438 * 14 13 11 17 17 C 1.40368 * 120.04862 * 179.97438 * 16 14 13 18 18 O 1.35679 * 120.13496 * 359.95523 * 17 16 14 19 19 C 1.38317 * 119.72790 * 179.97438 * 17 16 14 20 20 C 1.39565 * 119.81288 * 359.97438 * 19 17 16 21 21 C 1.47570 * 119.95598 * 180.02562 * 20 19 17 22 22 C 1.36105 * 125.94229 * 180.02562 * 21 20 19 23 23 C 1.40800 * 106.73149 * 179.97438 * 22 21 20 24 24 C 1.34828 * 107.04950 * 0.02562 * 23 22 21 25 25 C 1.50705 * 125.65415 * 179.97438 * 24 23 22 26 26 O 1.42897 * 109.46859 * 65.01093 * 25 24 23 27 27 Si 1.86296 * 109.47158 * 185.01393 * 25 24 23 28 28 O 1.34228 * 108.69468 * 359.97438 * 24 23 22 29 29 C 1.39962 * 120.09136 * 0.27655 * 20 19 17 30 30 C 1.36395 * 120.27693 * 359.44638 * 29 20 19 31 31 C 1.53780 * 113.68904 * 37.25551 * 8 7 6 32 32 C 1.38259 * 120.12632 * 359.48486 * 7 6 4 33 33 C 1.38176 * 120.09818 * 0.26033 * 32 7 6 34 34 H 1.09007 * 109.47374 * 300.00021 * 1 2 3 35 35 H 1.08997 * 109.47128 * 59.99902 * 1 2 3 36 36 H 1.09004 * 109.47703 * 180.02562 * 1 2 3 37 37 H 1.08005 * 119.97897 * 180.27538 * 6 4 3 38 38 H 1.08999 * 113.61585 * 25.52194 * 10 8 7 39 39 H 1.08993 * 113.68852 * 254.62471 * 10 8 7 40 40 H 0.97000 * 120.00081 * 334.99477 * 13 11 10 41 41 H 0.96704 * 114.00131 * 270.02010 * 18 17 16 42 42 H 1.08003 * 120.09542 * 180.02562 * 19 17 16 43 43 H 1.08000 * 126.63644 * 359.73546 * 22 21 20 44 44 H 1.08003 * 126.47658 * 179.97438 * 23 22 21 45 45 H 1.08997 * 109.46928 * 305.01679 * 25 24 23 46 46 H 0.96703 * 113.99771 * 179.97438 * 26 25 24 47 47 H 1.48500 * 110.00359 * 299.99882 * 27 25 24 48 48 H 1.48506 * 109.99827 * 61.32103 * 27 25 24 49 49 H 1.07998 * 119.86420 * 179.70669 * 29 20 19 50 50 H 1.07997 * 119.91250 * 180.25473 * 30 29 20 51 51 H 1.08998 * 113.61671 * 105.46309 * 31 8 7 52 52 H 1.09001 * 113.61501 * 334.55961 * 31 8 7 53 53 H 1.08002 * 119.94951 * 180.28241 * 32 7 6 54 54 H 1.08003 * 120.01849 * 179.97438 * 33 32 7 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 8 1.4289 0.0000 0.0000 3 6 2.0462 1.2114 0.0000 4 6 3.4333 1.2855 0.0005 5 9 4.1713 0.1539 0.0001 6 6 4.0579 2.5198 -0.0044 7 6 3.3023 3.6776 0.0010 8 6 3.9850 5.0212 0.0009 9 1 3.2983 5.8449 -0.1945 10 6 4.8917 5.2514 1.2215 11 6 5.8855 5.9216 0.2580 12 1 6.9273 5.6773 0.4659 13 7 5.6610 7.3594 0.0899 14 6 6.6788 8.1617 -0.2802 15 8 7.7838 7.6919 -0.4741 16 6 6.4529 9.6072 -0.4498 17 6 7.5123 10.4438 -0.8347 18 8 8.7469 9.9239 -1.0506 19 6 7.2927 11.8002 -0.9925 20 6 6.0201 12.3277 -0.7688 21 6 5.7821 13.7744 -0.9368 22 6 4.5961 14.4158 -0.7511 23 6 4.8262 15.7789 -1.0182 24 6 6.1270 15.9024 -1.3510 25 6 6.8214 17.1884 -1.7186 26 8 6.8361 18.0618 -0.5878 27 14 8.5710 16.8215 -2.2429 28 8 6.7009 14.6901 -1.3005 29 6 4.9705 11.4873 -0.3801 30 6 5.1816 10.1484 -0.2288 31 6 5.2607 5.0660 -0.8566 32 6 1.9216 3.6052 0.0005 33 6 1.2923 2.3751 0.0000 34 1 -0.3634 0.5139 0.8900 35 1 -0.3633 0.5138 -0.8899 36 1 -0.3635 -1.0277 0.0005 37 1 5.1363 2.5790 -0.0084 38 1 5.2682 4.3300 1.6658 39 1 4.4693 5.9348 1.9581 40 1 4.7798 7.7341 0.2449 41 1 9.3089 9.9051 -0.2638 42 1 8.1035 12.4493 -1.2889 43 1 3.6587 13.9656 -0.4594 44 1 4.0982 16.5750 -0.9671 45 1 6.2886 17.6669 -2.5403 46 1 7.2691 18.9108 -0.7522 47 1 9.3081 16.1689 -1.1312 48 1 8.5688 15.9395 -3.4377 49 1 3.9883 11.9002 -0.2034 50 1 4.3665 9.5047 0.0673 51 1 5.1352 5.6000 -1.7985 52 1 5.7380 4.0939 -0.9804 53 1 1.3342 4.5115 0.0000 54 1 0.2136 2.3200 0.0000 There are 80 doubly filled levels RHF calculation, no. of doubly occupied orbitals= 80 No. of singly occupied orbitals= 1 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) F: (AM1): M.J.S. DEWAR AND E. G. ZOEBISCH, THEOCHEM, 180, 1 (1988). 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=0 AM1 1SCF TLIMIT=15 GEO-OK SM5.42R & SOLVNT=WATER m_22_9824364_12807986.mol2 54 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Tue Mar 9 2021 12:57:53 Heat of formation + Delta-G solvation = -80.009767 kcal Electronic energy + Delta-G solvation = -40848.570953 eV Core-core repulsion = 35214.287885 eV Total energy + Delta-G solvation = -5634.283069 eV No. of doubly occupied orbitals = 80 and no. of open levels = 1 Molecular weight (most abundant/longest-lived isotopes) = 440.156 amu Computer time = 1.69 seconds Orbital eigenvalues (eV) -49.88995 -43.87273 -41.90738 -41.25756 -40.47516 -39.33847 -38.14074 -37.87641 -37.80243 -34.80714 -34.31090 -33.31781 -31.76492 -31.51464 -31.20055 -30.48590 -28.49798 -27.21643 -26.69396 -25.81559 -24.50378 -24.13786 -23.85115 -22.84389 -22.44131 -22.07835 -21.42886 -20.36623 -19.68795 -19.41725 -18.87895 -18.69350 -18.10472 -17.96527 -17.79695 -17.34157 -17.23717 -17.20183 -16.67359 -16.51889 -16.26412 -16.14407 -16.09816 -15.97231 -15.88018 -15.65579 -15.48912 -15.30062 -15.04206 -14.64088 -14.48284 -14.32181 -14.20550 -14.15345 -13.99655 -13.92818 -13.67009 -13.61099 -13.54401 -13.46141 -13.09146 -12.87800 -12.83068 -12.71917 -12.27552 -12.22883 -12.16055 -12.04984 -11.97329 -11.47439 -11.24524 -11.23309 -11.00465 -10.79234 -10.46075 -10.14937 -10.05150 -9.95706 -9.13237 -9.10842 -5.15607 -0.89267 0.04191 0.08981 0.16262 0.52713 1.11557 1.30936 1.50042 1.58355 1.83952 1.95475 1.96250 2.17648 2.46597 2.55233 2.91532 3.17208 3.19773 3.44539 3.49773 3.56109 3.65067 3.69632 3.70997 3.72158 3.72677 3.89836 3.90856 3.92850 3.98571 4.11419 4.20065 4.25917 4.27126 4.32737 4.33686 4.35202 4.50091 4.53790 4.59286 4.62796 4.68423 4.70197 4.77956 4.79199 4.84439 4.87804 4.91300 4.97190 5.01161 5.02898 5.07676 5.10501 5.12926 5.19646 5.35368 5.43637 5.46733 5.61486 5.65302 5.86147 6.25695 6.44506 6.59000 6.80939 7.13670 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.017 3.983 2 O -0.342 6.342 3 C 0.074 3.926 4 C 0.033 3.967 5 F -0.154 7.154 6 C -0.116 4.116 7 C -0.080 4.080 8 C -0.056 4.056 9 H 0.129 0.871 10 C -0.125 4.125 11 C 0.114 3.886 12 H 0.082 0.918 13 N -0.691 5.691 14 C 0.559 3.441 15 O -0.563 6.563 16 C -0.176 4.176 17 C 0.161 3.839 18 O -0.496 6.496 19 C -0.163 4.163 20 C 0.023 3.977 21 C -0.006 4.006 22 C -0.165 4.165 23 C -0.174 4.174 24 C -0.032 4.032 25 C -0.034 4.034 26 O -0.558 6.558 27 Si 0.797 3.203 28 O -0.199 6.199 29 C -0.106 4.106 30 C -0.045 4.045 31 C -0.149 4.149 32 C -0.076 4.076 33 C -0.179 4.179 34 H 0.072 0.928 35 H 0.071 0.929 36 H 0.113 0.887 37 H 0.147 0.853 38 H 0.096 0.904 39 H 0.097 0.903 40 H 0.417 0.583 41 H 0.408 0.592 42 H 0.122 0.878 43 H 0.192 0.808 44 H 0.177 0.823 45 H 0.129 0.871 46 H 0.414 0.586 47 H -0.310 1.310 48 H -0.298 1.298 49 H 0.176 0.824 50 H 0.182 0.818 51 H 0.069 0.931 52 H 0.090 0.910 53 H 0.166 0.834 54 H 0.162 0.838 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -10.170 8.767 1.732 13.539 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 -0.076 4.076 2 O -0.256 6.256 3 C 0.028 3.972 4 C 0.013 3.987 5 F -0.132 7.132 6 C -0.134 4.134 7 C -0.080 4.080 8 C -0.074 4.074 9 H 0.147 0.853 10 C -0.162 4.162 11 C 0.009 3.991 12 H 0.101 0.899 13 N -0.344 5.344 14 C 0.347 3.653 15 O -0.443 6.443 16 C -0.180 4.180 17 C 0.115 3.885 18 O -0.309 6.309 19 C -0.181 4.181 20 C 0.022 3.978 21 C -0.055 4.055 22 C -0.184 4.184 23 C -0.193 4.193 24 C -0.081 4.081 25 C -0.144 4.144 26 O -0.370 6.370 27 Si 0.705 3.295 28 O -0.098 6.098 29 C -0.124 4.124 30 C -0.063 4.063 31 C -0.187 4.187 32 C -0.093 4.093 33 C -0.197 4.197 34 H 0.091 0.909 35 H 0.090 0.910 36 H 0.131 0.869 37 H 0.165 0.835 38 H 0.114 0.886 39 H 0.116 0.884 40 H 0.256 0.744 41 H 0.268 0.732 42 H 0.140 0.860 43 H 0.209 0.791 44 H 0.195 0.805 45 H 0.147 0.853 46 H 0.267 0.733 47 H -0.238 1.238 48 H -0.226 1.226 49 H 0.193 0.807 50 H 0.199 0.801 51 H 0.088 0.912 52 H 0.108 0.892 53 H 0.184 0.816 54 H 0.179 0.821 Dipole moment (debyes) X Y Z Total from point charges -8.880 6.956 1.113 11.335 hybrid contribution 0.028 -0.615 0.386 0.727 sum -8.852 6.341 1.499 10.991 Atomic orbital electron populations 1.23405 0.75720 1.05707 1.02805 1.86109 1.24117 1.26557 1.88809 1.19338 0.90881 0.86613 1.00366 1.17436 0.86736 0.83182 1.11351 1.91449 1.76917 1.50213 1.94671 1.21013 1.01630 0.89573 1.01207 1.19613 0.93500 0.94120 1.00779 1.21594 0.95204 0.93924 0.96655 0.85305 1.23391 0.95043 1.01543 0.96266 1.21853 1.00216 0.79465 0.97590 0.89939 1.45383 1.12811 1.07067 1.69135 1.18164 0.84427 0.86225 0.76451 1.90833 1.25421 1.76799 1.51202 1.20515 0.96149 0.93291 1.08015 1.18469 0.86052 0.89692 0.94329 1.84727 1.23086 1.83829 1.39296 1.21491 0.97992 0.94442 1.04201 1.18023 0.94006 0.87452 0.98301 1.20772 0.88521 0.89186 1.06994 1.22333 0.98743 0.93351 1.03959 1.21913 0.95724 0.97991 1.03648 1.22215 0.93754 0.84914 1.07204 1.23877 1.11219 0.86399 0.92868 1.86410 1.83287 1.32174 1.35164 0.94488 0.74381 0.85048 0.75620 1.83953 1.39805 1.16994 1.68999 1.21100 0.99302 0.92567 0.99405 1.21251 0.95021 0.95417 0.94649 1.23591 0.96466 1.00604 0.98054 1.21328 0.93768 0.98143 0.96102 1.21474 1.01512 0.90864 1.05872 0.90934 0.91048 0.86871 0.83532 0.88570 0.88427 0.74404 0.73155 0.86040 0.79065 0.80512 0.85330 0.73299 1.23840 1.22607 0.80686 0.80130 0.91191 0.89169 0.81623 0.82093 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 0.02 -0.06 9.81 113.37 1.11 1.05 16 2 O -0.34 -2.26 10.36 -93.06 -0.96 -3.23 16 3 C 0.07 0.39 6.69 22.53 0.15 0.54 16 4 C 0.03 0.25 7.31 22.45 0.16 0.41 16 5 F -0.15 -1.95 17.11 44.97 0.77 -1.18 16 6 C -0.12 -0.21 8.60 22.29 0.19 -0.02 16 7 C -0.08 0.26 5.29 -19.85 -0.11 0.15 16 8 C -0.06 0.41 3.85 -11.01 -0.04 0.37 16 9 H 0.13 -1.62 8.09 -2.39 -0.02 -1.64 16 10 C -0.12 0.87 7.29 31.12 0.23 1.10 16 11 C 0.11 -0.24 4.32 45.52 0.20 -0.05 16 12 H 0.08 0.29 7.46 -2.38 -0.02 0.27 16 13 N -0.69 2.29 5.21 -443.43 -2.31 -0.02 16 14 C 0.56 2.87 7.75 86.62 0.67 3.54 16 15 O -0.56 -8.17 14.74 16.88 0.25 -7.92 16 16 C -0.18 -0.49 5.89 -19.97 -0.12 -0.60 16 17 C 0.16 1.21 6.71 22.81 0.15 1.36 16 18 O -0.50 -5.08 11.56 -68.97 -0.80 -5.88 16 19 C -0.16 -1.19 9.65 22.61 0.22 -0.97 16 20 C 0.02 0.08 5.87 -20.08 -0.12 -0.04 16 21 C -0.01 -0.03 7.02 24.24 0.17 0.14 16 22 C -0.17 -0.11 10.26 22.40 0.23 0.12 16 23 C -0.17 -0.37 10.78 22.11 0.24 -0.13 16 24 C -0.03 -0.17 6.24 24.90 0.16 -0.02 16 25 C -0.03 0.05 2.97 71.24 0.21 0.26 16 26 O -0.56 1.27 12.86 -148.98 -1.92 -0.64 16 27 Si 0.80 -0.14 32.11 68.60 2.20 2.06 16 28 O -0.20 -1.98 8.79 -5.92 -0.05 -2.03 16 29 C -0.11 0.46 9.48 22.26 0.21 0.67 16 30 C -0.05 0.25 9.47 22.25 0.21 0.46 16 31 C -0.15 0.42 7.25 31.12 0.23 0.64 16 32 C -0.08 0.38 9.70 22.26 0.22 0.60 16 33 C -0.18 0.34 9.04 22.36 0.20 0.54 16 34 H 0.07 -0.47 7.66 -2.38 -0.02 -0.49 16 35 H 0.07 -0.45 7.66 -2.39 -0.02 -0.46 16 36 H 0.11 -0.65 8.14 -2.38 -0.02 -0.67 16 37 H 0.15 -0.01 6.64 -2.91 -0.02 -0.03 16 38 H 0.10 -0.54 7.73 -2.39 -0.02 -0.56 16 39 H 0.10 -0.99 8.14 -2.39 -0.02 -1.01 16 40 H 0.42 -4.65 6.71 -92.71 -0.62 -5.27 16 41 H 0.41 1.25 9.06 -74.05 -0.67 0.58 16 42 H 0.12 1.17 7.90 -2.91 -0.02 1.14 16 43 H 0.19 -1.40 7.24 -2.91 -0.02 -1.42 16 44 H 0.18 -0.47 8.06 -2.91 -0.02 -0.49 16 45 H 0.13 -1.03 7.96 -2.39 -0.02 -1.05 16 46 H 0.41 -5.69 8.74 -74.06 -0.65 -6.34 16 47 H -0.31 -3.04 7.11 99.48 0.71 -2.33 16 48 H -0.30 -2.17 7.11 99.48 0.71 -1.46 16 49 H 0.18 -2.03 6.95 -2.91 -0.02 -2.05 16 50 H 0.18 -2.71 6.38 -2.91 -0.02 -2.73 16 51 H 0.07 -0.07 8.14 -2.39 -0.02 -0.09 16 52 H 0.09 -0.14 6.30 -2.39 -0.02 -0.15 16 53 H 0.17 -1.96 8.05 -2.91 -0.02 -1.98 16 54 H 0.16 -1.16 6.30 -2.91 -0.02 -1.18 16 Total: 0.00 -39.19 457.53 1.08 -38.12 By element: Atomic # 1 Polarization: -28.53 SS G_CDS: -0.88 Total: -29.41 kcal Atomic # 6 Polarization: 5.36 SS G_CDS: 4.77 Total: 10.13 kcal Atomic # 7 Polarization: 2.29 SS G_CDS: -2.31 Total: -0.02 kcal Atomic # 8 Polarization: -16.22 SS G_CDS: -3.48 Total: -19.70 kcal Atomic # 9 Polarization: -1.95 SS G_CDS: 0.77 Total: -1.18 kcal Atomic # 14 Polarization: -0.14 SS G_CDS: 2.20 Total: 2.06 kcal Total: -39.19 1.08 -38.12 kcal The number of atoms in the molecule is 54 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. m_22_9824364_12807986.mol2 54 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 -41.894 kcal (2) G-P(sol) polarization free energy of solvation -39.193 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -81.087 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy 1.077 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -38.116 kcal (6) G-S(sol) free energy of system = (1) + (5) -80.010 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.69 seconds