Wall clock time and date at job start Thu Mar 4 2021 17:45:19 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 N 1.46499 * 1 3 3 N 1.28465 * 124.88399 * 2 1 4 4 C 1.31811 * 110.07556 * 179.97438 * 3 2 1 5 5 C 1.47707 * 126.52272 * 179.97438 * 4 3 2 6 6 O 1.21567 * 120.00218 * 180.02562 * 5 4 3 7 7 N 1.34782 * 119.99982 * 0.02562 * 5 4 3 8 8 C 1.46493 * 119.99902 * 180.02562 * 7 5 4 9 9 C 1.53005 * 109.46899 * 180.02562 * 8 7 5 10 10 H 1.09000 * 112.84693 * 314.66418 * 9 8 7 11 11 C 1.53780 * 113.61703 * 85.86208 * 9 8 7 12 12 C 1.53953 * 87.02107 * 139.95080 * 11 9 8 13 13 F 1.39903 * 113.53393 * 89.19101 * 12 11 9 14 14 C 1.52999 * 113.74434 * 220.05555 * 12 11 9 15 15 N 1.46502 * 109.47363 * 277.59987 * 14 12 11 16 16 C 1.34770 * 120.00364 * 179.97438 * 15 14 12 17 17 O 1.21519 * 119.99539 * 0.02562 * 16 15 14 18 18 O 1.34633 * 120.00403 * 180.02562 * 16 15 14 19 19 C 1.45202 * 116.99994 * 180.02562 * 18 16 15 20 20 C 1.52997 * 109.47034 * 60.00314 * 19 18 16 21 21 C 1.53005 * 109.46667 * 179.97438 * 19 18 16 22 22 C 1.52997 * 109.47384 * 299.99751 * 19 18 16 23 23 C 1.53779 * 113.61497 * 183.47018 * 9 8 7 24 24 C 1.41506 * 106.96381 * 359.97438 * 4 3 2 25 25 C 1.35034 * 124.88693 * 179.70270 * 2 1 3 26 26 C 1.50707 * 126.38089 * 0.03766 * 25 2 1 27 27 O 1.42897 * 109.47300 * 29.99863 * 26 25 2 28 28 Si 1.86299 * 109.46950 * 150.00133 * 26 25 2 29 29 H 1.09002 * 109.47391 * 90.01884 * 1 2 3 30 30 H 1.09001 * 109.46813 * 330.01941 * 1 2 3 31 31 H 1.09004 * 109.47041 * 210.02068 * 1 2 3 32 32 H 0.97003 * 119.99689 * 0.02562 * 7 5 4 33 33 H 1.09002 * 109.47529 * 299.99807 * 8 7 5 34 34 H 1.08994 * 109.47471 * 60.00510 * 8 7 5 35 35 H 1.08997 * 113.61769 * 254.53050 * 11 9 8 36 36 H 1.09005 * 113.61333 * 25.43356 * 11 9 8 37 37 H 1.09004 * 109.47048 * 37.59537 * 14 12 11 38 38 H 1.09000 * 109.47216 * 157.59466 * 14 12 11 39 39 H 0.97003 * 119.99624 * 0.02562 * 15 14 12 40 40 H 1.09000 * 109.47804 * 59.99550 * 20 19 18 41 41 H 1.09003 * 109.46847 * 180.02562 * 20 19 18 42 42 H 1.09004 * 109.46921 * 299.99269 * 20 19 18 43 43 H 1.08991 * 109.47412 * 60.00203 * 21 19 18 44 44 H 1.09007 * 109.46898 * 179.97438 * 21 19 18 45 45 H 1.09000 * 109.46959 * 299.99708 * 21 19 18 46 46 H 1.09007 * 109.46782 * 60.00090 * 22 19 18 47 47 H 1.08995 * 109.47506 * 179.97438 * 22 19 18 48 48 H 1.09001 * 109.47010 * 300.00840 * 22 19 18 49 49 H 1.09000 * 113.61533 * 334.56750 * 23 9 8 50 50 H 1.09000 * 113.61780 * 105.38445 * 23 9 8 51 51 H 1.08000 * 127.25373 * 179.97438 * 24 4 3 52 52 H 1.08997 * 109.46831 * 269.99641 * 26 25 2 53 53 H 0.96699 * 113.99781 * 180.02562 * 27 26 25 54 54 H 1.48503 * 109.99836 * 178.67889 * 28 26 25 55 55 H 1.48504 * 109.99870 * 299.99730 * 28 26 25 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 7 1.4650 0.0000 0.0000 3 7 2.1997 1.0538 0.0000 4 6 3.4740 0.7169 0.0006 5 6 4.6273 1.6398 0.0002 6 8 5.7597 1.1977 0.0003 7 7 4.4241 2.9722 -0.0002 8 6 5.5679 3.8875 -0.0011 9 6 5.0648 5.3325 -0.0009 10 1 4.2582 5.4999 -0.7147 11 6 4.7672 5.8809 1.4047 12 6 5.3917 7.2064 0.9321 13 9 4.4703 8.0800 0.3446 14 6 6.2655 7.8867 1.9879 15 7 5.4166 8.6486 2.9073 16 6 5.9722 9.3344 3.9257 17 8 7.1774 9.3212 4.0812 18 8 5.1921 10.0342 4.7709 19 6 5.8589 10.7493 5.8444 20 6 6.8362 11.7655 5.2503 21 6 4.8175 11.4804 6.6940 22 6 6.6256 9.7559 6.7198 23 6 6.1903 6.3767 -0.0870 24 6 3.5273 -0.6971 0.0015 25 6 2.2373 -1.1076 0.0057 26 6 1.7533 -2.5349 0.0124 27 8 0.4958 -2.6146 -0.6615 28 14 2.9950 -3.6157 -0.8600 29 1 -0.3634 -0.0003 -1.0277 30 1 -0.3633 0.8902 0.5135 31 1 -0.3633 -0.8898 0.5142 32 1 3.5205 3.3250 0.0000 33 1 6.1731 3.7138 0.8886 34 1 6.1722 3.7131 -0.8913 35 1 3.7030 5.9540 1.6286 36 1 5.3342 5.3883 2.1947 37 1 6.8171 7.1298 2.5456 38 1 6.9680 8.5612 1.4984 39 1 4.4546 8.6588 2.7834 40 1 6.2900 12.4732 4.6266 41 1 7.3371 12.3020 6.0562 42 1 7.5781 11.2449 4.6447 43 1 4.1209 10.7568 7.1173 44 1 5.3180 12.0169 7.5002 45 1 4.2717 12.1882 6.0701 46 1 7.3675 9.2353 6.1142 47 1 7.1265 10.2927 7.5253 48 1 5.9293 9.0319 7.1430 49 1 7.1471 6.0200 0.2943 50 1 6.2743 6.8485 -1.0661 51 1 4.4109 -1.3181 0.0018 52 1 1.6362 -2.8740 1.0416 53 1 0.1235 -3.5064 -0.6952 54 1 2.5448 -5.0305 -0.8325 55 1 3.1638 -3.1636 -2.2644 There are 75 doubly filled levels RHF calculation, no. of doubly occupied orbitals= 75 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_16499940_13259642.mol2 55 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Thu Mar 4 2021 17:45:19 Heat of formation + Delta-G solvation = -90.827788 kcal Electronic energy + Delta-G solvation = -37403.031292 eV Core-core repulsion = 32166.116085 eV Total energy + Delta-G solvation = -5236.915207 eV No. of doubly occupied orbitals = 75 and no. of open levels = 1 Molecular weight (most abundant/longest-lived isotopes) = 399.205 amu Computer time = 1.83 seconds Orbital eigenvalues (eV) -48.85483 -43.80969 -41.84144 -40.70585 -39.58185 -38.39878 -38.05589 -36.12070 -35.41753 -34.78183 -34.38242 -32.78221 -30.43111 -28.71741 -28.38316 -28.31953 -27.46838 -26.99424 -26.53420 -24.20493 -23.40785 -22.25975 -22.14090 -21.33590 -20.93067 -20.34364 -19.35203 -18.66988 -18.46815 -17.82563 -17.53239 -17.44933 -17.42976 -17.19157 -16.91257 -16.62533 -16.50100 -16.14423 -15.98238 -15.69129 -15.51547 -15.46079 -15.22936 -14.89802 -14.76059 -14.58976 -14.45962 -14.35551 -13.99484 -13.83256 -13.67309 -13.55317 -13.38739 -13.35203 -13.34626 -13.11561 -13.01709 -12.93586 -12.88958 -12.51800 -12.42206 -12.39120 -12.23270 -12.04151 -11.85430 -11.53030 -11.42497 -11.38942 -11.20784 -11.13970 -11.01895 -10.34211 -10.30242 -9.99673 -9.86820 -4.89050 0.45125 0.81612 1.07230 1.27309 1.53833 1.65107 1.68894 1.98026 2.11399 2.31722 2.94376 2.99692 3.09640 3.20414 3.23570 3.30605 3.51155 3.54214 3.56953 3.72209 3.77637 3.92528 4.00146 4.09939 4.26172 4.29302 4.34245 4.38213 4.40518 4.44883 4.49583 4.56885 4.59907 4.65172 4.66382 4.67617 4.72330 4.73565 4.74897 4.76740 4.83044 4.85976 4.87876 4.90544 4.99923 5.04309 5.17654 5.25531 5.25748 5.30537 5.31837 5.43912 5.52712 5.68407 6.26508 6.37574 6.50572 6.82827 7.12119 7.24781 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.088 3.912 2 N -0.265 5.265 3 N -0.268 5.268 4 C -0.039 4.039 5 C 0.604 3.396 6 O -0.564 6.564 7 N -0.707 5.707 8 C 0.131 3.869 9 C -0.113 4.113 10 H 0.106 0.894 11 C -0.144 4.144 12 C 0.081 3.919 13 F -0.196 7.196 14 C 0.130 3.870 15 N -0.702 5.702 16 C 0.646 3.354 17 O -0.591 6.591 18 O -0.370 6.370 19 C 0.126 3.874 20 C -0.181 4.181 21 C -0.138 4.138 22 C -0.180 4.180 23 C -0.132 4.132 24 C -0.192 4.192 25 C 0.024 3.976 26 C -0.046 4.046 27 O -0.554 6.554 28 Si 0.774 3.226 29 H 0.087 0.913 30 H 0.102 0.898 31 H 0.117 0.883 32 H 0.414 0.586 33 H 0.076 0.924 34 H 0.070 0.930 35 H 0.088 0.912 36 H 0.113 0.887 37 H 0.101 0.899 38 H 0.077 0.923 39 H 0.415 0.585 40 H 0.060 0.940 41 H 0.088 0.912 42 H 0.064 0.936 43 H 0.070 0.930 44 H 0.099 0.901 45 H 0.068 0.932 46 H 0.064 0.936 47 H 0.087 0.913 48 H 0.062 0.938 49 H 0.124 0.876 50 H 0.093 0.907 51 H 0.184 0.816 52 H 0.118 0.882 53 H 0.406 0.594 54 H -0.265 1.265 55 H -0.313 1.313 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -5.452 -3.132 2.842 6.900 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 -0.051 4.051 2 N -0.054 5.054 3 N -0.106 5.106 4 C -0.198 4.198 5 C 0.389 3.611 6 O -0.442 6.442 7 N -0.359 5.359 8 C 0.008 3.992 9 C -0.132 4.132 10 H 0.124 0.876 11 C -0.181 4.181 12 C 0.063 3.937 13 F -0.177 7.177 14 C 0.007 3.993 15 N -0.362 5.362 16 C 0.399 3.601 17 O -0.482 6.482 18 O -0.284 6.284 19 C 0.090 3.910 20 C -0.238 4.238 21 C -0.195 4.195 22 C -0.237 4.237 23 C -0.170 4.170 24 C -0.220 4.220 25 C -0.101 4.101 26 C -0.156 4.156 27 O -0.365 6.365 28 Si 0.677 3.323 29 H 0.106 0.894 30 H 0.121 0.879 31 H 0.136 0.864 32 H 0.250 0.750 33 H 0.095 0.905 34 H 0.089 0.911 35 H 0.107 0.893 36 H 0.132 0.868 37 H 0.119 0.881 38 H 0.096 0.904 39 H 0.252 0.748 40 H 0.079 0.921 41 H 0.107 0.893 42 H 0.083 0.917 43 H 0.089 0.911 44 H 0.118 0.882 45 H 0.087 0.913 46 H 0.083 0.917 47 H 0.106 0.894 48 H 0.081 0.919 49 H 0.142 0.858 50 H 0.112 0.888 51 H 0.201 0.799 52 H 0.135 0.865 53 H 0.259 0.741 54 H -0.191 1.191 55 H -0.240 1.240 Dipole moment (debyes) X Y Z Total from point charges -4.691 -2.346 2.259 5.711 hybrid contribution -1.502 -0.558 -0.565 1.699 sum -6.194 -2.904 1.694 7.047 Atomic orbital electron populations 1.22470 0.70844 1.06430 1.05356 1.45662 1.09068 1.02015 1.48679 1.73441 1.02777 1.14735 1.19646 1.21843 0.90965 0.94454 1.12495 1.16967 0.86224 0.82132 0.75790 1.90789 1.23670 1.77792 1.51924 1.45778 1.11491 1.04725 1.73859 1.21447 0.87872 0.86922 1.02948 1.22689 0.99670 0.92512 0.98293 0.87559 1.23816 1.03436 0.93048 0.97839 1.22170 0.89521 0.87988 0.94062 1.92868 1.68026 1.71388 1.85404 1.21897 0.92455 0.95820 0.89085 1.44539 1.12058 1.51414 1.28185 1.18250 0.83736 0.78013 0.80083 1.90917 1.14434 1.67399 1.75406 1.86315 1.41038 1.60847 1.40239 1.22384 0.93553 0.91072 0.83963 1.22482 0.99797 0.98773 1.02736 1.21897 0.98130 1.00322 0.99153 1.22473 1.01118 0.99763 1.00329 1.23559 0.99026 0.94535 0.99899 1.21650 0.97097 0.93677 1.09540 1.21194 0.90734 0.90374 1.07797 1.24421 0.93590 0.93971 1.03666 1.86462 1.33895 1.36690 1.79492 0.93407 0.85052 0.74904 0.78932 0.89406 0.87924 0.86444 0.74960 0.90540 0.91138 0.89317 0.86830 0.88094 0.90423 0.74846 0.92059 0.89327 0.91743 0.91143 0.88201 0.91283 0.91666 0.89388 0.91866 0.85779 0.88828 0.79931 0.86471 0.74131 1.19072 1.24049 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 0.09 -0.36 10.13 127.77 1.29 0.93 16 2 N -0.27 -0.76 3.70 -355.91 -1.32 -2.08 16 3 N -0.27 -1.57 11.67 -48.17 -0.56 -2.13 16 4 C -0.04 -0.30 7.13 42.46 0.30 0.01 16 5 C 0.60 4.98 7.82 86.74 0.68 5.66 16 6 O -0.56 -8.00 16.93 -3.93 -0.07 -8.06 16 7 N -0.71 -1.14 5.55 -466.11 -2.59 -3.72 16 8 C 0.13 -0.24 5.50 86.38 0.48 0.23 16 9 C -0.11 0.65 3.73 -10.27 -0.04 0.61 16 10 H 0.11 -0.58 8.14 -2.39 -0.02 -0.60 16 11 C -0.14 0.89 7.09 31.18 0.22 1.11 16 12 C 0.08 -0.33 1.67 -10.21 -0.02 -0.35 16 13 F -0.20 -0.17 16.79 44.97 0.76 0.59 16 14 C 0.13 -0.21 5.37 86.38 0.46 0.25 16 15 N -0.70 -1.10 5.47 -590.85 -3.23 -4.33 16 16 C 0.65 4.70 8.06 129.79 1.05 5.75 16 17 O -0.59 -7.06 11.88 19.78 0.24 -6.82 16 18 O -0.37 -2.34 9.94 -55.43 -0.55 -2.89 16 19 C 0.13 0.43 1.13 -10.79 -0.01 0.42 16 20 C -0.18 -0.68 8.37 71.98 0.60 -0.07 16 21 C -0.14 0.22 8.85 71.98 0.64 0.86 16 22 C -0.18 -0.58 8.37 71.98 0.60 0.02 16 23 C -0.13 0.86 7.10 31.12 0.22 1.09 16 24 C -0.19 -0.89 9.35 22.41 0.21 -0.68 16 25 C 0.02 0.05 6.21 41.41 0.26 0.30 16 26 C -0.05 0.22 2.86 71.24 0.20 0.43 16 27 O -0.55 3.08 10.37 -148.98 -1.55 1.53 16 28 Si 0.77 -2.84 31.23 68.60 2.14 -0.69 16 29 H 0.09 -0.37 8.14 -2.39 -0.02 -0.39 16 30 H 0.10 -0.66 8.14 -2.39 -0.02 -0.68 16 31 H 0.12 -0.85 6.75 -2.38 -0.02 -0.86 16 32 H 0.41 -0.46 8.20 -92.71 -0.76 -1.22 16 33 H 0.08 -0.12 7.87 -2.39 -0.02 -0.14 16 34 H 0.07 -0.01 8.14 -2.39 -0.02 -0.03 16 35 H 0.09 -0.54 8.14 -2.39 -0.02 -0.56 16 36 H 0.11 -0.82 7.75 -2.38 -0.02 -0.84 16 37 H 0.10 -0.30 7.96 -2.38 -0.02 -0.32 16 38 H 0.08 0.00 8.14 -2.39 -0.02 -0.02 16 39 H 0.42 -0.42 8.30 -92.71 -0.77 -1.18 16 40 H 0.06 0.20 8.14 -2.39 -0.02 0.19 16 41 H 0.09 0.01 8.14 -2.39 -0.02 -0.01 16 42 H 0.06 0.57 5.88 -2.38 -0.01 0.56 16 43 H 0.07 -0.13 8.14 -2.39 -0.02 -0.15 16 44 H 0.10 -0.51 8.14 -2.38 -0.02 -0.52 16 45 H 0.07 -0.11 8.14 -2.39 -0.02 -0.13 16 46 H 0.06 0.54 5.88 -2.38 -0.01 0.53 16 47 H 0.09 -0.02 8.14 -2.39 -0.02 -0.04 16 48 H 0.06 0.16 8.14 -2.39 -0.02 0.14 16 49 H 0.12 -1.14 8.06 -2.39 -0.02 -1.16 16 50 H 0.09 -0.58 8.14 -2.39 -0.02 -0.60 16 51 H 0.18 0.16 7.02 -2.91 -0.02 0.14 16 52 H 0.12 -1.19 7.96 -2.39 -0.02 -1.21 16 53 H 0.41 -5.55 8.74 -74.06 -0.65 -6.20 16 54 H -0.27 0.46 7.11 99.48 0.71 1.17 16 55 H -0.31 -2.10 7.11 99.48 0.71 -1.39 16 Total: 0.00 -26.83 450.85 -0.77 -27.61 By element: Atomic # 1 Polarization: -14.37 SS G_CDS: -1.19 Total: -15.56 kcal Atomic # 6 Polarization: 9.42 SS G_CDS: 7.15 Total: 16.57 kcal Atomic # 7 Polarization: -4.56 SS G_CDS: -7.70 Total: -12.26 kcal Atomic # 8 Polarization: -14.32 SS G_CDS: -1.93 Total: -16.24 kcal Atomic # 9 Polarization: -0.17 SS G_CDS: 0.76 Total: 0.59 kcal Atomic # 14 Polarization: -2.84 SS G_CDS: 2.14 Total: -0.69 kcal Total: -26.83 -0.77 -27.61 kcal The number of atoms in the molecule is 55 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_16499940_13259642.mol2 55 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 -63.222 kcal (2) G-P(sol) polarization free energy of solvation -26.833 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -90.054 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -0.773 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -27.606 kcal (6) G-S(sol) free energy of system = (1) + (5) -90.828 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.84 seconds