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An n→π* Interaction in Aspirin: Implications for Structure and Reactivity Amit Choudhary,† Kimberli J. Kamer,§ and Ronald T. Raines*,§,‡ †

Graduate Program in Biophysics, §Department of Biochemistry, and ‡Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, United States *E-mail: [email protected]

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Contents

S1

Table of Contents

S2

Table S1. SCF energies of 1–17

S3

Table S2. Atomic coordinates of conformation 1

S4

Table S3. Atomic coordinates of conformation 2

S5

Table S4. Atomic coordinates of conformation 3

S6

Table S5. Atomic coordinates of conformation 4

S7

Table S6. Atomic coordinates of conformation 5

S8

Table S7. Atomic coordinates of conformation 6

S9

Table S8. Atomic coordinates of conformation 7

S10

Table S9. Atomic coordinates of conformation 8

S11

Table S10. Atomic coordinates of optimized conformation of compound 9

S12

Table S11. Atomic coordinates of optimized conformation of compound 10

S13

Table S12. Atomic coordinates of optimized conformation of compound 11

S14

Table S13. Atomic coordinates of optimized conformation of compound 12

S15

Table S14. Atomic coordinates of optimized conformation of compound 13

S16

Table S15. Atomic coordinates of optimized conformation of compound 14

S17

Table S16. Atomic coordinates of optimized conformation of compound 15

S18

Table S17. Atomic coordinates of optimized conformation of compound 16

S19

Table S17. Atomic coordinates of optimized conformation of compound 17

–S1–

Choudhary, Kamer, and Raines

Supporting Information

Table S1. SCF energies (atomic units; au) of conformations 1–8 and compounds 9–17 calculated at B3LYP/6–311+g(2d,p) level of theory. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Energy –648.90486736 –648.90352357 –648.89968559 –648.89608416 –648.89632496 –648.89602928 –648.36068901 –648.35897360 –852.94412753 –740.64220400 –762.92065233 –782.36282729 –852.94527260 –740.64241835 –762.91909983 –782.36260440 –836.35529075

Zero-point correction 0.156289 0.156276 0.156511 0.155933 0.156233 0.156205 0.142654 0.142703 0.144945 0.141245 0.174901 0.215057 0.145006 0.141267 0.174853 0.214879 0.144033

–S2–

Energy (corrected) –648.74857836 –648.74724757 –648.74317459 –648.74015116 –648.74008996 –648.73982428 –648.21803501 –648.21627060 –852.79918253 –740.50095900 –762.74575133 –782.14777029 –852.80026660 –740.50115135 –762.74424683 –782.14772540 –836.21125775

Choudhary, Kamer, and Raines

Supporting Information

Table S2. Atomic coordinates of conformation 1. Atom C C C H C C C H O O O C H C H H O C H H H

x –2.230697 –2.962483 –0.855930 –2.718526 –0.099142 –2.327725 –0.234591 –4.023695 1.083083 –0.891156 1.101854 –0.965978 –2.890459 2.044167 –0.305871 –0.450355 1.762207 3.416660 4.160962 3.519900 3.554458

y 0.489144 –0.687391 0.485360 1.434406 1.762837 –1.899451 –0.749617 –0.658819 1.890045 2.843649 –0.843211 –1.927494 –2.825045 –0.690381 3.615338 –2.858535 –0.639924 –0.612520 –0.709935 0.359416 –1.384228

–S3–

z 0.176517 0.201165 –0.093807 0.366055 –0.137471 –0.049511 –0.335898 0.413737 –0.351962 0.087939 –0.683006 –0.317353 –0.033993 0.311725 0.046459 –0.513895 1.474003 –0.285295 0.500991 –0.772337 –1.043246

Choudhary, Kamer, and Raines

Supporting Information

Table S3. Atomic coordinates of conformation 2. Atom C C C H C C C H O O O C H C H H O C H H H

x –2.271795 –2.967594 –0.897837 –2.773624 –0.280396 –2.293169 –0.237138 –4.029977 1.019131 –0.879227 1.109327 –0.930787 –2.824806 2.037807 1.276918 –0.385125 1.745092 3.424904 4.151162 3.571364 3.555546

y 0.463516 –0.733188 0.507663 1.402021 1.863683 –1.923849 –0.703773 –0.738613 1.906301 2.869506 –0.768613 –1.905417 –2.867696 –0.679596 2.839668 –2.819375 –0.593803 –0.715952 –0.708845 0.153713 –1.606519

–S4–

z 0.171187 0.188161 –0.097778 0.364787 –0.095556 –0.064340 –0.342244 0.396609 –0.473995 0.203632 –0.679532 –0.327052 –0.054258 0.329299 –0.410479 –0.523107 1.487453 –0.243617 0.564904 –0.886751 –0.860537

Choudhary, Kamer, and Raines

Supporting Information

Table S4. Atomic coordinates of conformation 3. Atom C C C H C C C H O O O C H C H H O C H H H

x –2.311983 –2.915244 –0.949110 –2.888511 –0.391394 –2.165352 –0.219417 –3.969723 –0.925122 0.710006 1.117224 –0.817654 –2.629201 2.116775 0.982928 –0.221848 1.920709 3.455362 4.239145 3.578705 3.514067

y 0.354510 –0.891385 0.481174 1.257626 1.878423 –2.039522 –0.682389 –0.966058 2.745681 2.131793 –0.649356 –1.932634 –3.016911 –0.544328 1.349460 –2.809392 –0.281421 –0.772534 –0.601480 –0.100127 –1.794579

–S5–

z 0.215422 0.295300 –0.069469 0.369410 –0.138249 0.061189 –0.307102 0.529490 –0.776107 0.590569 –0.744713 –0.253346 0.109855 0.169039 1.107091 –0.472923 1.331179 –0.465519 0.267264 –1.316103 –0.845104

Choudhary, Kamer, and Raines

Supporting Information

Table S5. Atomic coordinates of conformation 4. Atom C C C H C C C H O O O C H C H H O C H H H

x –2.146087 –3.056398 –0.784579 –2.500556 0.165338 –2.607536 –0.354376 –4.109140 1.009279 –0.006563 0.965738 –1.255458 –3.307057 1.939893 –0.586342 –0.883015 1.695836 3.298193 4.041350 3.512834 3.323659

y 0.767709 –0.277969 0.527239 1.790586 1.673484 –1.589056 –0.800118 –0.067981 1.723573 2.715368 –1.130601 –1.848642 –2.413053 –0.748729 2.457515 –2.862231 –0.234913 –1.058791 –0.959409 –0.344318 –2.059281

–S6–

z 0.053715 0.138821 –0.151039 0.109000 –0.326446 0.035854 –0.254160 0.279313 –1.178368 0.525372 –0.513605 –0.153648 0.104538 0.379083 1.254589 –0.228182 1.434601 –0.172513 0.614440 –0.971044 –0.604650

Choudhary, Kamer, and Raines

Supporting Information

Table S6. Atomic coordinates of conformation 5. Atom C C C H C C C H O O O C H C H H C O H H H

x –2.258754 –2.776570 –0.917611 –2.888341 –0.372302 –1.960316 –0.105711 –3.813660 0.779013 –1.330923 1.180934 –0.633626 –2.358889 2.295481 –0.889397 0.007592 2.061075 3.362737 3.027948 1.508722 1.481931

y 0.193126 –1.092525 0.425801 1.038813 1.808001 –2.170345 –0.671873 –1.252637 2.105256 2.746750 –0.505434 –1.958059 –3.177703 –0.474980 3.607330 –2.779543 –0.629975 –0.349816 –0.655789 –1.545333 0.215788

–S7–

z 0.260423 0.286744 –0.066810 0.500676 –0.032595 –0.042537 –0.392010 0.552941 0.173752 –0.231089 –0.858874 –0.391903 –0.040108 –0.035112 –0.156870 –0.685731 1.443133 –0.554103 1.938621 1.662247 1.814743

Choudhary, Kamer, and Raines

Supporting Information

Table S7. Atomic coordinates of conformation 6. Atom C C C H C C C H O O O C H C H H C O H H H

x –2.280052 –2.821321 –0.934670 –2.886600 –0.475234 –2.022518 –0.141835 –3.862339 0.862357 –1.223312 1.156378 –0.691767 –2.437822 2.256737 1.037875 –0.064051 2.000124 3.337265 2.958583 1.469356 1.386707

y 0.259052 –1.015536 0.476002 1.123193 1.894573 –2.104651 –0.632955 –1.159628 2.044147 2.840507 –0.490965 –1.910566 –3.105190 –0.553807 2.998447 –2.740109 –0.792846 –0.428885 –0.824245 –1.733688 0.007187

–S8–

z 0.253272 0.265725 –0.068457 0.490322 –0.053470 –0.071624 –0.400280 0.525547 0.067213 –0.109860 –0.853831 –0.413673 –0.081839 –0.021041 0.052034 –0.714215 1.443884 –0.515014 1.954953 1.599468 1.859650

Choudhary, Kamer, and Raines

Supporting Information

Table S8. Atomic coordinates of conformation 7. Atom C C C H C C C H O O O C H C H O C H H H

x –2.196746 –2.993685 –0.831674 –2.610664 –0.012091 –2.438299 –0.304934 –4.048276 1.219002 –0.686267 1.027514 –1.086998 –3.049337 1.988878 –0.622140 1.791741 3.316684 4.118014 3.287546 3.462132

y 0.632637 –0.506199 0.585713 1.610520 1.905402 –1.740617 –0.668545 –0.431687 1.785958 2.942654 –0.789157 –1.816542 –2.636972 –0.816689 –2.758802 –1.183691 –0.404334 –0.712931 0.683955 –0.825152

–S9–

z 0.251664 0.252234 –0.044928 0.465385 –0.015701 –0.075482 –0.361333 0.497626 0.188221 –0.183665 –0.767196 –0.389942 –0.088113 0.203779 –0.655521 1.331655 –0.364727 0.304490 –0.448066 –1.361306

Choudhary, Kamer, and Raines

Supporting Information

Table S9. Atomic coordinates of conformation 8. Atom C C C H C C C H O O O C H C H C O H H H

x 0.000000 1.389009 –0.746117 –0.549889 –2.287042 2.081690 –0.025788 1.932056 –2.833274 –2.789772 –0.665625 1.366192 3.165815 –1.040858 1.872177 –0.903677 –1.463267 –1.176046 0.113627 –1.582478

y 0.000000 0.000000 1.184206 –0.933628 1.084120 1.208189 2.379219 –0.939333 1.719614 0.343684 3.619801 2.398429 1.225544 4.355567 3.355258 3.713009 5.468065 4.443367 3.354627 2.852485

–S10–

z 0.000000 0.000000 0.000000 –0.016878 0.049157 –0.039212 –0.025950 0.013289 0.981052 –0.816954 –0.141902 –0.068037 –0.061698 0.945599 –0.131833 2.296929 0.756797 3.055692 2.465453 2.310950

Choudhary, Kamer, and Raines

Supporting Information

Table S10. Atomic coordinates of optimized conformation of compound 9. Atom C C C

x –1.215153 –2.076158 0.155723

y 0.799875 –0.288944 0.636489

z 0.017767 –0.040507 –0.169605

H C C C O O C H C H O C H H H N O O

–1.585247 1.068265 –1.614982 0.609006 0.473964 1.943646 –0.259450 –2.309275 2.832935 0.150648 2.514505 4.223517 4.944995 4.283269 4.413853 –3.509997 –4.255622 –3.910485

1.801036 1.897439 –1.574323 –0.660753 2.971073 –0.900531 –1.748477 –2.399952 –0.899494 –2.726385 –1.170714 –0.628638 –0.921484 0.444825 –1.157489 –0.090964 –1.067698 1.033499

0.185809 –0.109775 –0.318228 –0.430788 –0.317241 –0.713946 –0.519142 –0.368019 0.340098 –0.738196 1.464205 –0.151536 0.608854 –0.338375 –1.087176 0.175511 0.058344 0.462862

–S11–

Choudhary, Kamer, and Raines

Supporting Information

Table S11. Atomic coordinates of optimized conformation of compound 10. Atom C C C H C C C O O O C H C H O C C N H H H

x –1.575317 –2.440084 –0.203552 –1.948709 0.684796 –1.933480 0.270845 1.897653 0.067183 1.608898 –0.576446 –2.599765 2.507557 –0.151564 2.207226 3.888814 –3.843632 –4.979161 3.929908 4.624052 4.075511

y 0.765315 –0.332119 0.632372 1.763851 1.909637 –1.604595 –0.650731 1.715896 2.977092 –0.856880 –1.752033 –2.456230 –0.882817 –2.719285 –1.193105 –0.571130 –0.167724 –0.054308 0.510638 –0.886363 –1.053514

–S12–

z 0.062602 0.002516 –0.140532 0.250313 –0.058567 –0.297293 –0.427324 0.182360 –0.233078 –0.735628 –0.517394 –0.354067 0.305983 –0.755542 1.425645 –0.189056 0.228919 0.407882 –0.328228 0.548947 –1.150118

Choudhary, Kamer, and Raines

Supporting Information

Table S12. Atomic coordinates of optimized conformation of compound 11. Atom C C C H C C C O O O C H C H O C H H H C H H H O

x –1.531899 –2.276583 –0.144484 –1.975308 0.595958 –1.645045 0.464725 1.832002 –0.141657 1.830744 –0.272884 –2.233607 2.708952 0.243746 2.434571 4.063954 4.818379 4.004026 4.305279 –4.316401 –5.368769 –3.947481 –4.208513 –3.645099

y 0.528247 –0.643060 0.524561 1.503061 1.893113 –1.862240 –0.706292 1.845348 2.892411 –0.787555 –1.883126 –2.771262 –0.715217 –2.815249 –1.012501 –0.288038 –0.517988 0.790075 –0.768320 0.518594 0.262774 0.996061 1.223189 –0.700403

–S13–

z 0.001271 –0.037139 –0.181019 0.149847 –0.115494 –0.282468 –0.417558 0.079498 –0.252444 –0.709656 –0.475635 –0.318045 0.332674 –0.672364 1.465212 –0.156252 0.594168 –0.317768 –1.106245 0.403224 0.527098 1.316930 –0.427919 0.145475

Choudhary, Kamer, and Raines

Supporting Information

Table S13. Atomic coordinates of optimized conformation of compound 12. Atom C C C H C C C O O O C H C H O C H H H C C H H H H H H N

x –1.112001 –2.016272 0.250482 –1.438831 1.150343 –1.516024 0.712225 2.367830 0.545362 2.051266 –0.154234 –2.167504 2.959870 0.241091 2.685123 4.339413 4.390893 5.084761 4.502024 –4.247332 –4.030548 –3.826322 –5.223025 –4.412712 –3.402729 –4.239871 –4.978152 –3.391689

y 0.792822 –0.272829 0.657308 1.790166 1.919690 –1.528403 –0.617304 1.708973 3.007967 –0.819752 –1.689219 –2.385806 –0.949379 –2.657783 –1.333740 –0.616862 0.472761 –1.001760 –1.016822 –1.226769 1.067446 –1.990206 –0.938660 –1.680476 1.952627 0.860819 1.292210 –0.060524

–S14–

z 0.150127 0.062474 –0.091666 0.413877 0.045662 –0.299561 –0.438470 0.253755 –0.053829 –0.788971 –0.544452 –0.400574 0.221608 –0.828123 1.327540 –0.272078 –0.320697 0.421894 –1.274632 0.399326 –0.294612 1.055024 0.798170 –0.595475 –0.242475 –1.359082 0.202512 0.370211

Choudhary, Kamer, and Raines

Supporting Information

Table S14. Atomic coordinates of optimized conformation of compound 13. Atom C C H C C C O O O C C H O C N O O H H H C H

x –0.569861 0.537251 –0.388419 1.948902 –2.049373 0.293586 2.850473 1.999858 1.358867 –0.979461 2.072375 –1.141214 1.619126 3.447472 –3.396421 –4.329547 –3.548642 3.905815 3.414433 4.016866 –1.855411 –2.706490

y 1.911937 1.123484 2.956083 1.750682 0.066056 –0.213787 1.038362 2.900283 –1.011184 –0.751331 –1.661216 –1.783251 –1.941467 –1.992589 –0.486580 0.241806 –1.657363 –2.738681 –2.341517 –1.060681 1.400099 2.010597

–S15–

z 0.301640 –0.032247 0.522516 –0.032421 –0.030395 –0.364938 0.461184 –0.510333 –0.775102 –0.382573 0.202804 –0.655687 1.277771 –0.295493 –0.039852 0.305905 –0.393571 0.350547 –1.328711 –0.263993 0.323447 0.588521

Choudhary, Kamer, and Raines

Supporting Information

Table S15. Atomic coordinates of optimized conformation of compound 14. Atom C C H C C C O O O C C H O C H H H C N C H

x –0.993933 0.149819 –0.853409 1.529600 –2.411584 –0.034653 2.502907 1.487601 1.051268 –1.285970 1.839450 –1.380726 1.446121 3.204364 3.723464 3.139633 3.732347 –3.709204 –4.761157 –2.256203 –3.126500

y 1.801677 1.066925 2.852056 1.776735 –0.115280 –0.277634 1.061525 2.985900 –1.039515 –0.869713 –1.609636 –1.910697 –1.870471 –1.903494 –2.600949 –2.299854 –0.948124 –0.714291 –1.192046 1.233250 1.821142

–S16–

z 0.300323 –0.026706 0.522446 –0.013326 –0.034769 –0.362126 0.313021 –0.312938 –0.785756 –0.381532 0.183918 –0.661248 1.287480 –0.364196 0.290364 –1.378858 –0.398313 –0.046639 –0.056399 0.315834 0.581254

Choudhary, Kamer, and Raines

Supporting Information

Table S16. Atomic coordinates of optimized conformation of compound 15. Atom C C H C C C O O O C C H O C C H H H O H H H C H

x –0.975221 0.229547 –0.912085 1.542399 –2.253678 0.137623 2.613852 1.379717 1.264778 –1.072146 2.165415 –1.096636 1.876453 3.511326 –4.628210 –5.404250 –4.636159 –4.837465 –3.408613 3.956548 4.128362 3.409659 –2.208555 –3.108471

y 1.643863 0.996597 2.707335 1.827623 –0.365933 –0.372282 1.176115 3.065827 –1.106266 –1.048160 –1.431674 –2.105542 –1.548393 –1.715783 –0.470554 –1.231577 –0.054173 0.334007 –1.120976 –0.745716 –2.258513 –2.280577 0.994424 1.555578

–S17–

z 0.192507 –0.067747 0.388285 –0.049696 –0.104590 –0.348447 –0.022836 –0.057732 –0.718295 –0.377558 0.259719 –0.607776 1.420538 –0.343703 0.135624 0.055003 1.149306 –0.578723 –0.152144 –0.571187 0.370370 –1.272341 0.188565 0.402762

Choudhary, Kamer, and Raines

Supporting Information

Table S17. Atomic coordinates of optimized conformation of compound 16. Atom C C H C C C O O O C C H O C H H H C C H H H H H H N C H

x –0.480649 0.631131 –0.292502 2.029459 –2.015916 0.365648 3.018750 2.011705 1.382062 –0.912265 2.286517 –1.024352 2.043917 3.559516 4.102142 4.144446 3.347704 –3.734038 –4.381318 –2.948621 –4.614848 –3.991399 –4.096321 –4.659946 –5.268725 –3.313375 –1.775493 –2.590965

y 1.864193 1.066262 2.925827 1.732849 –0.006222 –0.297441 0.961976 2.977071 –1.190632 –0.827399 –1.537439 –1.898327 –1.523351 –2.029931 –1.143087 –2.579722 –2.655904 –1.437297 0.289051 –2.140424 –2.011648 –0.858357 0.793456 1.058773 –0.315872 –0.583734 1.360866 2.045962

–S18–

z 0.158862 –0.097571 0.264107 –0.201864 0.072395 –0.261799 –0.162782 –0.308869 –0.607620 –0.183196 0.359031 –0.293240 1.536268 –0.268868 –0.600433 0.466563 –1.137916 –0.915353 0.630900 –1.180864 –0.615418 –1.819819 1.554506 –0.110630 0.832679 0.186969 0.247062 0.438112

Choudhary, Kamer, and Raines

Supporting Information

Table S18. Atomic coordinates of optimized conformation of compound 17. Atom C C C H C C C H O O O C H C O C H H H C O O

x –1.741024 –0.703737 –1.484517 –2.778740 –2.698659 0.613841 –0.142547 –0.923130 –2.601018 –3.682774 0.099015 0.933594 1.446940 0.676776 0.876004 1.048987 1.330203 0.215230 1.895852 2.439223 2.710414 3.243612

y –1.925407 –2.838452 –0.576096 –2.233734 0.383130 –2.420846 –0.191715 –3.882688 1.505650 –0.102676 1.140927 –1.091906 –3.106992 1.964723 1.731868 3.255678 4.000615 3.614389 3.038198 –0.754253 0.359667 –1.667802

–S19–

z 0.223761 0.372452 –0.024612 0.279116 –0.154820 0.225244 –0.148233 0.585785 0.386957 –0.772297 –0.492899 –0.063195 0.315739 0.390798 1.557190 –0.297904 0.445510 –0.903784 –0.952802 –0.309092 –0.815887 0.004941