Wall clock time and date at job start Sun Mar 7 2021 08:25:00 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 C 1.53002 * 1 3 3 C 1.52997 * 109.46890 * 2 1 4 4 C 1.53002 * 109.47194 * 240.00267 * 2 1 3 5 5 O 1.45192 * 109.47007 * 120.00180 * 2 1 3 6 6 C 1.34633 * 117.00292 * 60.00043 * 5 2 1 7 7 O 1.21509 * 119.99816 * 0.02562 * 6 5 2 8 8 N 1.34784 * 119.99957 * 180.02562 * 6 5 2 9 9 C 1.46496 * 119.99541 * 180.02562 * 8 6 5 10 10 H 1.08998 * 112.85756 * 23.80092 * 9 8 6 11 11 C 1.53784 * 113.61389 * 155.00179 * 9 8 6 12 12 C 1.53774 * 87.08280 * 89.19579 * 11 9 8 13 13 F 1.39897 * 113.61624 * 270.80414 * 12 11 9 14 14 C 1.53002 * 113.61405 * 139.98101 * 12 11 9 15 15 N 1.46506 * 109.47035 * 181.52851 * 14 12 11 16 16 C 1.34777 * 119.99873 * 179.97438 * 15 14 12 17 17 O 1.21284 * 119.99754 * 0.02562 * 16 15 14 18 18 C 1.50696 * 120.00137 * 180.02562 * 16 15 14 19 19 C 1.53035 * 109.33284 * 180.02562 * 18 16 15 20 20 C 1.53543 * 108.56659 * 169.83177 * 19 18 16 21 21 N 1.47036 * 107.65644 * 299.05141 * 20 19 18 22 22 C 1.38930 * 118.88162 * 43.66001 * 21 20 19 23 23 C 1.31114 * 121.84818 * 346.68740 * 22 21 20 24 24 C 1.50704 * 118.54263 * 180.42894 * 23 22 21 25 25 O 1.42904 * 109.46605 * 249.97719 * 24 23 22 26 26 Si 1.86297 * 109.47411 * 9.97354 * 24 23 22 27 27 C 1.53776 * 87.17414 * 25.39273 * 12 11 9 28 28 H 1.08998 * 109.47498 * 299.99825 * 1 2 3 29 29 H 1.09001 * 109.46771 * 60.00328 * 1 2 3 30 30 H 1.09000 * 109.47021 * 179.97438 * 1 2 3 31 31 H 1.09001 * 109.46853 * 180.02562 * 3 2 1 32 32 H 1.09007 * 109.47563 * 300.00019 * 3 2 1 33 33 H 1.09001 * 109.47612 * 59.99967 * 3 2 1 34 34 H 1.08999 * 109.46754 * 300.00116 * 4 2 1 35 35 H 1.08998 * 109.47263 * 59.99845 * 4 2 1 36 36 H 1.08996 * 109.46972 * 179.97438 * 4 2 1 37 37 H 0.96999 * 119.99798 * 359.97438 * 8 6 5 38 38 H 1.08999 * 113.61135 * 334.64585 * 11 9 8 39 39 H 1.09000 * 113.69159 * 203.76010 * 11 9 8 40 40 H 1.09004 * 109.46930 * 61.53081 * 14 12 11 41 41 H 1.09000 * 109.47312 * 301.53025 * 14 12 11 42 42 H 0.96999 * 120.00080 * 0.02562 * 15 14 12 43 43 H 1.09003 * 109.32656 * 60.34610 * 18 16 15 44 44 H 1.09001 * 109.62006 * 289.55840 * 19 18 16 45 45 H 1.09008 * 109.62197 * 49.92274 * 19 18 16 46 46 H 1.08993 * 109.81769 * 58.58759 * 20 19 18 47 47 H 1.08991 * 109.82173 * 179.51375 * 20 19 18 48 48 H 0.96993 * 120.55690 * 223.68659 * 21 20 19 49 49 H 1.07997 * 119.06950 * 166.68290 * 22 21 20 50 50 H 1.08995 * 109.47038 * 129.97865 * 24 23 22 51 51 H 0.96691 * 114.00551 * 59.99902 * 25 24 23 52 52 H 1.48506 * 109.99749 * 58.68298 * 26 24 23 53 53 H 1.48503 * 110.00104 * 180.02562 * 26 24 23 54 54 H 1.09006 * 113.61785 * 89.15899 * 27 12 11 55 55 H 1.09002 * 113.61550 * 220.05982 * 27 12 11 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 2.0399 1.4425 0.0000 4 6 2.0400 -0.7212 -1.2493 5 8 2.0140 -0.6845 1.1855 6 6 1.6522 -1.9723 1.3383 7 8 0.9517 -2.5097 0.5035 8 7 2.0672 -2.6654 2.4172 9 6 1.6740 -4.0668 2.5830 10 1 1.4225 -4.5505 1.6392 11 6 2.6470 -4.8809 3.4522 12 6 1.8041 -4.4476 4.6632 13 9 2.2253 -3.2434 5.2372 14 6 1.5982 -5.5580 5.6955 15 7 0.7570 -5.0604 6.7868 16 6 0.4401 -5.8703 7.8164 17 8 0.8517 -7.0109 7.8396 18 6 -0.4257 -5.3586 8.9387 19 6 -0.6293 -6.4715 9.9693 20 6 -1.2900 -5.8677 11.2168 21 7 -0.3792 -4.8458 11.7535 22 6 0.2363 -3.9659 10.8719 23 6 0.2378 -4.1719 9.5771 24 6 0.9365 -3.1739 8.6900 25 8 -0.0341 -2.4482 7.9328 26 14 1.9171 -1.9886 9.7408 27 6 0.6254 -4.2864 3.6887 28 1 -0.3634 0.5138 0.8900 29 1 -0.3633 0.5138 -0.8900 30 1 -0.3633 -1.0277 -0.0005 31 1 3.1300 1.4425 -0.0005 32 1 1.6766 1.9564 -0.8900 33 1 1.6766 1.9564 0.8900 34 1 1.6767 -1.7488 -1.2493 35 1 1.6767 -0.2074 -2.1392 36 1 3.1300 -0.7208 -1.2495 37 1 2.6268 -2.2365 3.0833 38 1 3.6617 -4.4828 3.4617 39 1 2.6149 -5.9531 3.2589 40 1 2.5646 -5.8675 6.0937 41 1 1.1112 -6.4098 5.2207 42 1 0.4275 -4.1483 6.7680 43 1 -1.3932 -5.0555 8.5386 44 1 -1.2746 -7.2441 9.5510 45 1 0.3349 -6.9047 10.2357 46 1 -2.2412 -5.4095 10.9461 47 1 -1.4527 -6.6460 11.9623 48 1 -0.2105 -4.7873 12.7069 49 1 0.7273 -3.0877 11.2643 50 1 1.6084 -3.6990 8.0112 51 1 -0.6667 -1.9556 8.4733 52 1 2.9086 -2.7343 10.5571 53 1 2.6106 -0.9988 8.8778 54 1 0.0383 -5.1956 3.5593 55 1 0.0103 -3.4091 3.8888 There are 73 doubly filled levels RHF calculation, no. of doubly occupied orbitals= 73 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 s_22_15774724_15608500.mol2 55 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Sun Mar 7 2021 08:25:00 Heat of formation + Delta-G solvation = -139.859976 kcal Electronic energy + Delta-G solvation = -38366.020702 eV Core-core repulsion = 33320.631352 eV Total energy + Delta-G solvation = -5045.389350 eV No. of doubly occupied orbitals = 73 and no. of open levels = 1 Molecular weight (most abundant/longest-lived isotopes) = 386.210 amu Computer time = 1.55 seconds Orbital eigenvalues (eV) -48.96251 -41.93281 -41.58335 -40.01355 -39.23627 -37.93439 -37.63505 -35.89298 -35.26876 -33.99160 -33.38277 -32.68397 -29.36583 -28.39562 -28.33542 -27.23919 -27.10247 -25.79535 -24.45005 -23.25758 -23.00654 -21.79909 -21.22942 -20.68675 -19.49309 -19.29238 -18.97592 -18.25089 -17.70003 -17.58391 -17.30151 -17.16654 -17.12341 -16.64698 -16.50479 -16.23582 -15.92943 -15.78267 -15.56585 -15.43634 -15.39738 -15.12608 -14.67160 -14.59694 -14.49176 -14.47743 -14.17272 -13.97863 -13.80511 -13.47958 -13.37606 -13.21699 -13.18981 -13.14940 -12.94686 -12.90678 -12.84293 -12.59385 -12.48935 -12.35186 -12.26004 -11.97751 -11.89115 -11.73333 -11.44145 -11.40707 -11.35323 -11.18050 -10.85150 -10.35163 -10.31446 -10.04717 -8.44835 -5.04993 1.05311 1.21412 1.34431 1.59721 1.64169 1.65502 2.00056 2.13931 2.66691 2.94112 2.99733 3.05676 3.18284 3.47903 3.50715 3.58702 3.70691 3.71032 3.76476 3.87331 3.91057 3.94787 4.19506 4.24254 4.31422 4.32037 4.38162 4.44665 4.50272 4.55300 4.56968 4.58272 4.58674 4.70896 4.73360 4.73582 4.77701 4.78954 4.81261 4.82920 4.84454 4.85844 4.87682 5.09924 5.18407 5.24311 5.24820 5.26504 5.33204 5.36982 5.43571 5.53081 6.26530 6.31255 6.41462 6.91839 6.97690 7.16656 7.23910 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.180 4.180 2 C 0.126 3.874 3 C -0.138 4.138 4 C -0.180 4.180 5 O -0.372 6.372 6 C 0.649 3.351 7 O -0.587 6.587 8 N -0.688 5.688 9 C 0.133 3.867 10 H 0.116 0.884 11 C -0.142 4.142 12 C 0.078 3.922 13 F -0.195 7.195 14 C 0.105 3.895 15 N -0.724 5.724 16 C 0.519 3.481 17 O -0.583 6.583 18 C -0.033 4.033 19 C -0.120 4.120 20 C 0.124 3.876 21 N -0.744 5.744 22 C 0.170 3.830 23 C -0.304 4.304 24 C -0.065 4.065 25 O -0.557 6.557 26 Si 0.761 3.239 27 C -0.159 4.159 28 H 0.060 0.940 29 H 0.088 0.912 30 H 0.064 0.936 31 H 0.068 0.932 32 H 0.101 0.899 33 H 0.068 0.932 34 H 0.065 0.935 35 H 0.088 0.912 36 H 0.061 0.939 37 H 0.413 0.587 38 H 0.096 0.904 39 H 0.146 0.854 40 H 0.070 0.930 41 H 0.099 0.901 42 H 0.421 0.579 43 H 0.109 0.891 44 H 0.078 0.922 45 H 0.052 0.948 46 H 0.076 0.924 47 H 0.099 0.901 48 H 0.415 0.585 49 H 0.153 0.847 50 H 0.096 0.904 51 H 0.398 0.602 52 H -0.297 1.297 53 H -0.306 1.306 54 H 0.132 0.868 55 H 0.077 0.923 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -3.263 3.332 4.450 6.446 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 -0.237 4.237 2 C 0.090 3.910 3 C -0.195 4.195 4 C -0.237 4.237 5 O -0.286 6.286 6 C 0.403 3.597 7 O -0.478 6.478 8 N -0.347 5.347 9 C 0.029 3.971 10 H 0.133 0.867 11 C -0.180 4.180 12 C 0.060 3.940 13 F -0.175 7.175 14 C -0.019 4.019 15 N -0.382 5.382 16 C 0.307 3.693 17 O -0.463 6.463 18 C -0.054 4.054 19 C -0.159 4.159 20 C -0.001 4.001 21 N -0.374 5.374 22 C 0.047 3.953 23 C -0.315 4.315 24 C -0.177 4.177 25 O -0.366 6.366 26 Si 0.670 3.330 27 C -0.198 4.198 28 H 0.080 0.920 29 H 0.107 0.893 30 H 0.083 0.917 31 H 0.087 0.913 32 H 0.119 0.881 33 H 0.087 0.913 34 H 0.084 0.916 35 H 0.107 0.893 36 H 0.080 0.920 37 H 0.250 0.750 38 H 0.115 0.885 39 H 0.164 0.836 40 H 0.088 0.912 41 H 0.117 0.883 42 H 0.263 0.737 43 H 0.127 0.873 44 H 0.097 0.903 45 H 0.071 0.929 46 H 0.094 0.906 47 H 0.117 0.883 48 H 0.251 0.749 49 H 0.170 0.830 50 H 0.113 0.887 51 H 0.249 0.751 52 H -0.224 1.224 53 H -0.235 1.235 54 H 0.150 0.850 55 H 0.096 0.904 Dipole moment (debyes) X Y Z Total from point charges -2.318 2.375 3.652 4.934 hybrid contribution 0.535 0.091 0.113 0.554 sum -1.783 2.466 3.765 4.841 Atomic orbital electron populations 1.22474 0.93887 1.03786 1.03554 1.22392 0.94598 0.92563 0.81430 1.21902 1.02425 0.90927 1.04292 1.22475 1.01611 1.02326 0.97277 1.86321 1.71574 1.23237 1.47486 1.18238 0.78518 0.80812 0.82165 1.90901 1.41928 1.70814 1.44153 1.44467 1.55006 1.12074 1.23183 1.21897 0.95789 0.79372 1.00058 0.86655 1.24010 0.99395 1.03835 0.90798 1.22287 0.98461 0.81064 0.92231 1.92853 1.91137 1.47341 1.86214 1.21863 0.96278 0.96221 0.87571 1.46537 1.52210 1.17644 1.21762 1.21137 0.80231 0.84693 0.83247 1.90676 1.55800 1.20382 1.79449 1.19682 0.98270 0.94592 0.92886 1.21705 1.01671 0.96629 0.95929 1.21687 0.92255 0.90973 0.95174 1.44703 1.49555 1.34338 1.08845 1.20564 0.92636 0.92488 0.89622 1.20440 1.15694 1.01046 0.94322 1.25055 0.96370 0.97038 0.99214 1.86298 1.46165 1.66594 1.37545 0.94560 0.81336 0.77928 0.79210 1.24213 0.96609 1.05265 0.93748 0.92046 0.89272 0.91661 0.91271 0.88091 0.91286 0.91622 0.89297 0.92006 0.75039 0.88495 0.83575 0.91175 0.88263 0.73688 0.87293 0.90315 0.92876 0.90594 0.88288 0.74903 0.83034 0.88674 0.75116 1.22443 1.23462 0.85036 0.90426 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 14. 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 -0.18 -0.71 8.37 71.98 0.60 -0.11 16 2 C 0.13 0.51 1.13 -10.79 -0.01 0.49 16 3 C -0.14 0.13 8.85 71.98 0.64 0.77 16 4 C -0.18 -0.68 8.37 71.98 0.60 -0.08 16 5 O -0.37 -2.76 9.94 -55.43 -0.55 -3.31 16 6 C 0.65 5.32 8.06 129.79 1.05 6.37 16 7 O -0.59 -7.20 11.48 19.81 0.23 -6.98 16 8 N -0.69 -2.12 5.19 -567.32 -2.94 -5.07 16 9 C 0.13 -0.07 4.33 45.58 0.20 0.12 16 10 H 0.12 0.08 7.46 -2.39 -0.02 0.06 16 11 C -0.14 0.65 7.28 31.12 0.23 0.88 16 12 C 0.08 -0.07 1.63 -10.27 -0.02 -0.09 16 13 F -0.20 -0.75 15.79 44.97 0.71 -0.04 16 14 C 0.10 0.15 5.35 86.38 0.46 0.61 16 15 N -0.72 -2.79 3.77 -463.04 -1.75 -4.54 16 16 C 0.52 3.83 6.85 87.66 0.60 4.43 16 17 O -0.58 -8.59 15.80 -3.04 -0.05 -8.63 16 18 C -0.03 -0.05 2.75 -12.43 -0.03 -0.09 16 19 C -0.12 -0.11 4.91 30.79 0.15 0.04 16 20 C 0.12 -0.68 7.16 86.46 0.62 -0.06 16 21 N -0.74 4.46 5.83 -345.90 -2.02 2.44 16 22 C 0.17 -0.72 9.61 83.41 0.80 0.08 16 23 C -0.30 0.27 5.03 -16.76 -0.08 0.19 16 24 C -0.07 0.00 1.69 71.24 0.12 0.12 16 25 O -0.56 1.34 11.40 -148.98 -1.70 -0.36 16 26 Si 0.76 -0.86 29.72 68.60 2.04 1.18 16 27 C -0.16 0.26 7.34 31.18 0.23 0.49 16 28 H 0.06 0.22 8.14 -2.39 -0.02 0.20 16 29 H 0.09 0.01 8.14 -2.39 -0.02 -0.01 16 30 H 0.06 0.58 5.88 -2.39 -0.01 0.57 16 31 H 0.07 -0.07 8.14 -2.39 -0.02 -0.09 16 32 H 0.10 -0.47 8.14 -2.38 -0.02 -0.49 16 33 H 0.07 -0.06 8.14 -2.39 -0.02 -0.08 16 34 H 0.06 0.57 5.88 -2.39 -0.01 0.56 16 35 H 0.09 0.01 8.14 -2.39 -0.02 -0.01 16 36 H 0.06 0.20 8.14 -2.39 -0.02 0.18 16 37 H 0.41 0.68 7.90 -92.71 -0.73 -0.05 16 38 H 0.10 -0.44 8.14 -2.39 -0.02 -0.46 16 39 H 0.15 -1.34 8.10 -2.39 -0.02 -1.36 16 40 H 0.07 0.24 8.14 -2.38 -0.02 0.22 16 41 H 0.10 -0.04 7.98 -2.39 -0.02 -0.06 16 42 H 0.42 1.24 4.75 -92.71 -0.44 0.80 16 43 H 0.11 -0.11 8.14 -2.39 -0.02 -0.13 16 44 H 0.08 0.08 8.14 -2.39 -0.02 0.06 16 45 H 0.05 0.35 7.76 -2.38 -0.02 0.33 16 46 H 0.08 -0.55 8.14 -2.39 -0.02 -0.57 16 47 H 0.10 -0.83 8.14 -2.39 -0.02 -0.85 16 48 H 0.41 -4.12 8.96 -92.71 -0.83 -4.95 16 49 H 0.15 -1.32 4.50 -2.91 -0.01 -1.33 16 50 H 0.10 0.46 5.29 -2.39 -0.01 0.45 16 51 H 0.40 -4.24 8.70 -74.06 -0.64 -4.89 16 52 H -0.30 -1.43 7.11 99.48 0.71 -0.73 16 53 H -0.31 -2.28 7.11 99.48 0.71 -1.58 16 54 H 0.13 -0.66 7.99 -2.38 -0.02 -0.68 16 55 H 0.08 0.12 8.14 -2.39 -0.02 0.10 16 Total: 0.00 -24.40 426.96 -1.53 -25.94 By element: Atomic # 1 Polarization: -13.14 SS G_CDS: -1.65 Total: -14.79 kcal Atomic # 6 Polarization: 8.01 SS G_CDS: 6.15 Total: 14.16 kcal Atomic # 7 Polarization: -0.45 SS G_CDS: -6.71 Total: -7.16 kcal Atomic # 8 Polarization: -17.21 SS G_CDS: -2.07 Total: -19.28 kcal Atomic # 9 Polarization: -0.75 SS G_CDS: 0.71 Total: -0.04 kcal Atomic # 14 Polarization: -0.86 SS G_CDS: 2.04 Total: 1.18 kcal Total: -24.40 -1.53 -25.94 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. s_22_15774724_15608500.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 -113.923 kcal (2) G-P(sol) polarization free energy of solvation -24.402 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -138.325 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -1.535 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -25.937 kcal (6) G-S(sol) free energy of system = (1) + (5) -139.860 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.55 seconds