| You need a browser with JavaScript support in order to view the molecule in 3D |
|
Transitions — Left-clk & drag: Zoom; Right-clk: reset |
|
Frequency [wavenumbers] |
Wavelength [microns] |
Integrated cross-section [km/mol] |
Symmetry | Scaling factor |
|---|---|---|---|---|
| 3100 | 3.226 | 24.38 | A | 0.9597 |
| 3084 | 3.243 | 11.1 | A | 0.9597 |
| 3079 | 3.248 | 1.675 | A | 0.9597 |
| 3077 | 3.25 | 21.3 | A | 0.9597 |
| 3069 | 3.259 | 63.28 | A | 0.9597 |
| 3067 | 3.26 | 100.1 | A | 0.9597 |
| 3067 | 3.26 | 222.8 | A | 0.9597 |
| 3067 | 3.26 | 43.56 | A | 0.9597 |
| 3067 | 3.26 | 38.22 | A | 0.9597 |
| 3054 | 3.274 | 26.28 | A | 0.9597 |
| 3052 | 3.276 | 4.331 | A | 0.9597 |
| 3052 | 3.276 | 18.43 | A | 0.9597 |
| 3052 | 3.277 | 67.74 | A | 0.9597 |
| 3051 | 3.277 | 52.8 | A | 0.9597 |
| 3050 | 3.278 | 4.938 | A | 0.9597 |
| 3050 | 3.279 | 11.65 | A | 0.9597 |
| 3049 | 3.279 | 16.18 | A | 0.9597 |
| 3049 | 3.28 | 4.942 | A | 0.9597 |
| 3048 | 3.281 | 0.3432 | A | 0.9597 |
| 3047 | 3.281 | 0.1789 | A | 0.9597 |
| 3047 | 3.282 | 0.0209 | A | 0.9597 |
| 3047 | 3.282 | 1.237 | A | 0.9597 |
| 3046 | 3.283 | 1.11 | A | 0.9597 |
| 1621 | 6.17 | 24.55 | A | 0.9691 |
| 1619 | 6.177 | 7.738 | A | 0.9691 |
| 1618 | 6.182 | 6.368 | A | 0.9691 |
| 1613 | 6.2 | 10.38 | A | 0.9691 |
| 1610 | 6.212 | 14.59 | A | 0.9691 |
| 1607 | 6.223 | 2.77 | A | 0.9691 |
| 1604 | 6.236 | 3.325 | A | 0.9691 |
| 1602 | 6.241 | 1.684 | A | 0.9691 |
| 1597 | 6.26 | 4.901 | A | 0.9691 |
| 1596 | 6.267 | 132.9 | A | 0.9691 |
| 1595 | 6.269 | 35.73 | A | 0.9691 |
| 1589 | 6.292 | 49.25 | A | 0.9691 |
| 1583 | 6.316 | 10.16 | A | 0.9691 |
| 1578 | 6.336 | 51.17 | A | 0.9691 |
| 1573 | 6.356 | 21.39 | A | 0.9691 |
| 1571 | 6.365 | 13.85 | A | 0.9691 |
| 1568 | 6.378 | 16.14 | A | 0.9691 |
| 1565 | 6.388 | 63.91 | A | 0.9691 |
| 1558 | 6.418 | 17.08 | A | 0.9691 |
| 1551 | 6.446 | 27.34 | A | 0.9691 |
| 1550 | 6.45 | 5.587 | A | 0.9691 |
| 1545 | 6.471 | 18.19 | A | 0.9691 |
| 1541 | 6.489 | 55.33 | A | 0.9691 |
| 1535 | 6.513 | 23.59 | A | 0.9691 |
| 1522 | 6.571 | 26.79 | A | 0.9691 |
| 1520 | 6.58 | 18.66 | A | 0.9691 |
| 1509 | 6.627 | 14.09 | A | 0.9691 |
| 1509 | 6.629 | 33.03 | A | 0.9691 |
| 1506 | 6.639 | 28.91 | A | 0.9691 |
| 1501 | 6.66 | 0.8303 | A | 0.9691 |
| 1497 | 6.68 | 6.78 | A | 0.9691 |
| 1492 | 6.704 | 46.92 | A | 0.9691 |
| 1490 | 6.711 | 47.67 | A | 0.9691 |
| 1476 | 6.776 | 6.733 | A | 0.9691 |
| 1474 | 6.787 | 3.371 | A | 0.9691 |
| 1471 | 6.8 | 7.377 | A | 0.9691 |
| 1465 | 6.827 | 16.54 | A | 0.9691 |
| 1464 | 6.833 | 9.673 | A | 0.9691 |
| 1462 | 6.839 | 1.313 | A | 0.9691 |
| 1459 | 6.854 | 11.08 | A | 0.9691 |
| 1457 | 6.864 | 11.01 | A | 0.9691 |
| 1453 | 6.883 | 4.369 | A | 0.9691 |
| 1452 | 6.886 | 10.62 | A | 0.9691 |
| 1448 | 6.907 | 5.364 | A | 0.9691 |
| 1444 | 6.926 | 9.048 | A | 0.9691 |
| 1441 | 6.942 | 2.008 | A | 0.9691 |
| 1432 | 6.983 | 23.39 | A | 0.9691 |
| 1428 | 7 | 8.805 | A | 0.9691 |
| 1426 | 7.01 | 12.16 | A | 0.9691 |
| 1424 | 7.021 | 10.84 | A | 0.9691 |
| 1418 | 7.054 | 3.29 | A | 0.9691 |
| 1416 | 7.06 | 2.612 | A | 0.9691 |
| 1411 | 7.088 | 2.763 | A | 0.9691 |
| 1409 | 7.097 | 2.656 | A | 0.9691 |
| 1407 | 7.107 | 5.324 | A | 0.9691 |
| 1404 | 7.123 | 6.041 | A | 0.9691 |
| 1402 | 7.133 | 6.107 | A | 0.9691 |
| 1400 | 7.142 | 9.23 | A | 0.9691 |
| 1398 | 7.156 | 8.882 | A | 0.9691 |
| 1395 | 7.171 | 2.593 | A | 0.9691 |
| 1394 | 7.175 | 4.553 | A | 0.9691 |
| 1390 | 7.197 | 1.085 | A | 0.9691 |
| 1388 | 7.206 | 5.312 | A | 0.9691 |
| 1387 | 7.21 | 1.46 | A | 0.9691 |
| 1386 | 7.217 | 1.698 | A | 0.9691 |
| 1382 | 7.235 | 2.509 | A | 0.9691 |
| 1380 | 7.247 | 23.86 | A | 0.9691 |
| 1378 | 7.255 | 3.016 | A | 0.9691 |
| 1375 | 7.271 | 2.26 | A | 0.9691 |
| 1371 | 7.292 | 17.38 | A | 0.9691 |
| 1369 | 7.305 | 2.673 | A | 0.9691 |
| 1368 | 7.311 | 19.74 | A | 0.9691 |
| 1364 | 7.332 | 3.727 | A | 0.9691 |
| 1362 | 7.341 | 12.35 | A | 0.9691 |
| 1358 | 7.364 | 3.466 | A | 0.9691 |
| 1353 | 7.388 | 5.42 | A | 0.9691 |
| 1352 | 7.397 | 16.03 | A | 0.9691 |
| 1349 | 7.412 | 2.48 | A | 0.9691 |
| 1346 | 7.429 | 17.66 | A | 0.9691 |
| 1345 | 7.437 | 8.026 | A | 0.9691 |
| 1337 | 7.482 | 1.854 | A | 0.9691 |
| 1333 | 7.501 | 43.38 | A | 0.9691 |
| 1325 | 7.545 | 1.198 | A | 0.9691 |
| 1323 | 7.56 | 4.361 | A | 0.9691 |
| 1318 | 7.587 | 14.77 | A | 0.9691 |
| 1317 | 7.593 | 18.2 | A | 0.9691 |
| 1310 | 7.632 | 71.24 | A | 0.9691 |
| 1307 | 7.65 | 60.94 | A | 0.9691 |
| 1298 | 7.706 | 17.93 | A | 0.9691 |
| 1294 | 7.73 | 25.88 | A | 0.9691 |
| 1292 | 7.74 | 26.62 | A | 0.9691 |
| 1286 | 7.776 | 16.9 | A | 0.9691 |
| 1284 | 7.79 | 0.9637 | A | 0.9691 |
| 1278 | 7.826 | 22.89 | A | 0.9691 |
| 1272 | 7.863 | 26.79 | A | 0.9691 |
| 1268 | 7.887 | 4.497 | A | 0.9691 |
| 1266 | 7.898 | 19.29 | A | 0.9691 |
| 1265 | 7.905 | 5.682 | A | 0.9691 |
| 1256 | 7.962 | 62.86 | A | 0.9691 |
| 1250 | 7.999 | 352.3 | A | 0.9691 |
| 1238 | 8.076 | 5.994 | A | 0.9691 |
| 1215 | 8.23 | 0.5795 | A | 0.9691 |
| 1211 | 8.261 | 1.136 | A | 0.9691 |
| 1208 | 8.279 | 0.5762 | A | 0.9691 |
| 1204 | 8.305 | 9.152 | A | 0.9691 |
| 1204 | 8.306 | 6.443 | A | 0.9691 |
| 1202 | 8.318 | 7.456 | A | 0.9691 |
| 1200 | 8.33 | 21.2 | A | 0.9691 |
| 1190 | 8.4 | 13.68 | A | 0.9691 |
| 1185 | 8.441 | 0.8631 | A | 0.9691 |
| 1183 | 8.453 | 0.6396 | A | 0.9691 |
| 1180 | 8.471 | 6.371 | A | 0.9691 |
| 1177 | 8.5 | 23.62 | A | 0.9691 |
| 1165 | 8.58 | 40.46 | A | 0.9691 |
| 1165 | 8.587 | 6.962 | A | 0.9691 |
| 1162 | 8.605 | 22.31 | A | 0.9691 |
| 1159 | 8.628 | 115.1 | A | 0.9691 |
| 1158 | 8.637 | 21.26 | A | 0.9691 |
| 1154 | 8.666 | 12.49 | A | 0.9691 |
| 1144 | 8.741 | 2.224 | A | 0.9691 |
| 1131 | 8.842 | 290.5 | A | 0.9691 |
| 1126 | 8.884 | 36.54 | A | 0.9691 |
| 1120 | 8.932 | 1.722 | A | 0.9691 |
| 1116 | 8.964 | 6.73 | A | 0.9691 |
| 1114 | 8.979 | 10.26 | A | 0.9691 |
| 1093 | 9.146 | 0.2404 | A | 0.9691 |
| 1080 | 9.258 | 3.907 | A | 0.9794 |
| 1080 | 9.263 | 5.704 | A | 0.9794 |
| 1078 | 9.274 | 6.707 | A | 0.9794 |
| 1074 | 9.31 | 1.161 | A | 0.9794 |
| 1051 | 9.511 | 2.846 | A | 0.9794 |
| 1045 | 9.569 | 0.7205 | A | 0.9794 |
| 1044 | 9.579 | 0.2586 | A | 0.9794 |
| 1043 | 9.591 | 3.198 | A | 0.9794 |
| 1041 | 9.605 | 0.8307 | A | 0.9794 |
| 1035 | 9.664 | 3.937 | A | 0.9794 |
| 973.2 | 10.28 | 0.1401 | A | 0.9794 |
| 969.5 | 10.31 | 0.785 | A | 0.9794 |
| 961 | 10.41 | 0.7974 | A | 0.9794 |
| 958.2 | 10.44 | 0.0646 | A | 0.9794 |
| 956.3 | 10.46 | 0.072 | A | 0.9794 |
| 955.2 | 10.47 | 0.0046 | A | 0.9794 |
| 954 | 10.48 | 0.0015 | A | 0.9794 |
| 946.5 | 10.57 | 0.8962 | A | 0.9794 |
| 943.5 | 10.6 | 1.036 | A | 0.9794 |
| 942.3 | 10.61 | 0.3722 | A | 0.9794 |
| 932 | 10.73 | 1.375 | A | 0.9794 |
| 920.1 | 10.87 | 1.482 | A | 0.9794 |
| 915.4 | 10.92 | 10.01 | A | 0.9794 |
| 911.3 | 10.97 | 13.44 | A | 0.9794 |
| 893.8 | 11.19 | 116 | A | 0.9794 |
| 892.4 | 11.21 | 49.92 | A | 0.9794 |
| 888.1 | 11.26 | 0.4448 | A | 0.9794 |
| 887.7 | 11.27 | 0.4521 | A | 0.9794 |
| 884.3 | 11.31 | 2.896 | A | 0.9794 |
| 882.8 | 11.33 | 2.945 | A | 0.9794 |
| 882 | 11.34 | 34.07 | A | 0.9794 |
| 875.9 | 11.42 | 17.97 | A | 0.9794 |
| 862 | 11.6 | 27.94 | A | 0.9794 |
| 858.4 | 11.65 | 14.39 | A | 0.9794 |
| 853.9 | 11.71 | 2.028 | A | 0.9794 |
| 844.7 | 11.84 | 6.62 | A | 0.9794 |
| 840.4 | 11.9 | 2.986 | A | 0.9794 |
| 831.2 | 12.03 | 12.42 | A | 0.9794 |
| 829.8 | 12.05 | 1.793 | A | 0.9794 |
| 829.1 | 12.06 | 6.149 | A | 0.9794 |
| 810.5 | 12.34 | 10.86 | A | 0.9794 |
| 802.7 | 12.46 | 4.047 | A | 0.9794 |
| 802.2 | 12.47 | 32.1 | A | 0.9794 |
| 800.3 | 12.5 | 0.8049 | A | 0.9794 |
| 799 | 12.52 | 5.829 | A | 0.9794 |
| 796.7 | 12.55 | 7.997 | A | 0.9794 |
| 795.3 | 12.57 | 0.9259 | A | 0.9794 |
| 795.1 | 12.58 | 2.532 | A | 0.9794 |
| 789.3 | 12.67 | 0.339 | A | 0.9794 |
| 784.5 | 12.75 | 0.2226 | A | 0.9794 |
| 780.2 | 12.82 | 2.483 | A | 0.9794 |
| 778.6 | 12.84 | 0.4604 | A | 0.9794 |
| 776.9 | 12.87 | 0.1295 | A | 0.9794 |
| 775.1 | 12.9 | 0.3943 | A | 0.9794 |
| 754.3 | 13.26 | 0.1788 | A | 0.9794 |
| 746.2 | 13.4 | 0.3842 | A | 0.9794 |
| 745.7 | 13.41 | 0.6539 | A | 0.9794 |
| 741.9 | 13.48 | 0.1877 | A | 0.9794 |
| 741.4 | 13.49 | 16.82 | A | 0.9794 |
| 739.3 | 13.53 | 2.899 | A | 0.9794 |
| 737.4 | 13.56 | 3.973 | A | 0.9794 |
| 735 | 13.6 | 0.6159 | A | 0.9794 |
| 732.8 | 13.65 | 1.338 | A | 0.9794 |
| 729.1 | 13.72 | 0.0301 | A | 0.9794 |
| 717.4 | 13.94 | 2.914 | A | 0.9794 |
| 716.6 | 13.96 | 0.6608 | A | 0.9794 |
| 715.9 | 13.97 | 3.167 | A | 0.9794 |
| 715.5 | 13.98 | 4.626 | A | 0.9794 |
| 713.2 | 14.02 | 2.523 | A | 0.9794 |
| 710.7 | 14.07 | 1.058 | A | 0.9794 |
| 707.5 | 14.13 | 0.4269 | A | 0.9794 |
| 704.5 | 14.19 | 0.1627 | A | 0.9794 |
| 701.1 | 14.26 | 0.3624 | A | 0.9794 |
| 679.5 | 14.72 | 1.095 | A | 0.9794 |
| 668.1 | 14.97 | 0.3927 | A | 0.9794 |
| 667.1 | 14.99 | 4.354 | A | 0.9794 |
| 664.5 | 15.05 | 1.459 | A | 0.9794 |
| 658.4 | 15.19 | 0.1493 | A | 0.9794 |
| 652 | 15.34 | 0.1275 | A | 0.9794 |
| 647.8 | 15.44 | 0.6711 | A | 0.9794 |
| 646.6 | 15.46 | 0.4595 | A | 0.9794 |
| 644.8 | 15.51 | 0.1243 | A | 0.9794 |
| 644.6 | 15.51 | 2.554 | A | 0.9794 |
| 642.3 | 15.57 | 0.2483 | A | 0.9794 |
| 634.6 | 15.76 | 1.297 | A | 0.9794 |
| 632.8 | 15.8 | 0.1349 | A | 0.9794 |
| 631.9 | 15.83 | 0.0952 | A | 0.9794 |
| 630.8 | 15.85 | 1.834 | A | 0.9794 |
| 630.5 | 15.86 | 3.564 | A | 0.9794 |
| 629.3 | 15.89 | 0.4064 | A | 0.9794 |
| 626.1 | 15.97 | 2.05 | A | 0.9794 |
| 625.3 | 15.99 | 3.099 | A | 0.9794 |
| 623.9 | 16.03 | 4.098 | A | 0.9794 |
| 610.7 | 16.38 | 0.4647 | A | 0.9794 |
| 609.4 | 16.41 | 0.1938 | A | 0.9794 |
| 608.2 | 16.44 | 5.545 | A | 0.9794 |
| 604.8 | 16.53 | 0.6637 | A | 0.9794 |
| 603.3 | 16.58 | 9.897 | A | 0.9794 |
| 597.2 | 16.74 | 1.276 | A | 0.9794 |
| 596.2 | 16.77 | 1.85 | A | 0.9794 |
| 595.2 | 16.8 | 0.2504 | A | 0.9794 |
| 591.1 | 16.92 | 4.788 | A | 0.9794 |
| 589.3 | 16.97 | 0.1236 | A | 0.9794 |
| 588.5 | 16.99 | 12.47 | A | 0.9794 |
| 587.1 | 17.03 | 0.1674 | A | 0.9794 |
| 584.9 | 17.1 | 4.99 | A | 0.9794 |
| 584.6 | 17.11 | 5.731 | A | 0.9794 |
| 583.7 | 17.13 | 2.814 | A | 0.9794 |
| 575.4 | 17.38 | 0.791 | A | 0.9794 |
| 574 | 17.42 | 3.987 | A | 0.9794 |
| 571.8 | 17.49 | 3.005 | A | 0.9794 |
| 569.9 | 17.55 | 3.328 | A | 0.9794 |
| 567.3 | 17.63 | 4.485 | A | 0.9794 |
| 566.2 | 17.66 | 15.57 | A | 0.9794 |
| 557.9 | 17.92 | 1.52 | A | 0.9794 |
| 555.3 | 18.01 | 15.4 | A | 0.9794 |
| 552.3 | 18.11 | 71.88 | A | 0.9794 |
| 551.2 | 18.14 | 5.618 | A | 0.9794 |
| 550 | 18.18 | 10.7 | A | 0.9794 |
| 544.7 | 18.36 | 5.853 | A | 0.9794 |
| 541.1 | 18.48 | 0.3994 | A | 0.9794 |
| 538.3 | 18.58 | 0.5924 | A | 0.9794 |
| 534.9 | 18.7 | 0.0776 | A | 0.9794 |
| 520.2 | 19.23 | 0.0378 | A | 0.9794 |
| 511.3 | 19.56 | 0.1307 | A | 0.9794 |
| 507.1 | 19.72 | 1.433 | A | 0.9794 |
| 506.5 | 19.74 | 0.9522 | A | 0.9794 |
| 503.8 | 19.85 | 5.877 | A | 0.9794 |
| 499 | 20.04 | 5.024 | A | 0.9794 |
| 495.7 | 20.17 | 0.0674 | A | 0.9794 |
| 495.2 | 20.19 | 0.4925 | A | 0.9794 |
| 492.1 | 20.32 | 4.477 | A | 0.9794 |
| 477.3 | 20.95 | 41.85 | A | 0.9794 |
| 475.5 | 21.03 | 14.01 | A | 0.9794 |
| 462.8 | 21.61 | 63.78 | A | 0.9794 |
| 448.4 | 22.3 | 0.4258 | A | 0.9794 |
| 445.2 | 22.46 | 0.3681 | A | 0.9794 |
| 441.9 | 22.63 | 0.4506 | A | 0.9794 |
| 440.5 | 22.7 | 0.0057 | A | 0.9794 |
| 436.2 | 22.92 | 0.549 | A | 0.9794 |
| 431.8 | 23.16 | 1.47 | A | 0.9794 |
| 429.9 | 23.26 | 0.8584 | A | 0.9794 |
| 423.9 | 23.59 | 0.9231 | A | 0.9794 |
| 421.4 | 23.73 | 0.2893 | A | 0.9794 |
| 419.9 | 23.81 | 0.4237 | A | 0.9794 |
| 414.6 | 24.12 | 0.5909 | A | 0.9794 |
| 411 | 24.33 | 0.394 | A | 0.9794 |
| 404.7 | 24.71 | 0.2672 | A | 0.9794 |
| 403.4 | 24.79 | 3.511 | A | 0.9794 |
| 403.3 | 24.8 | 0.4309 | A | 0.9794 |
| 402.1 | 24.87 | 0.0075 | A | 0.9794 |
| 399.5 | 25.03 | 8.48 | A | 0.9794 |
| 387.1 | 25.83 | 0.1735 | A | 0.9794 |
| 382.9 | 26.12 | 0.2347 | A | 0.9794 |
| 375.8 | 26.61 | 0.3027 | A | 0.9794 |
| 373.5 | 26.77 | 0.5674 | A | 0.9794 |
| 368 | 27.17 | 1.549 | A | 0.9794 |
| 360.4 | 27.75 | 0.5635 | A | 0.9794 |
| 358 | 27.93 | 2.226 | A | 0.9794 |
| 353.4 | 28.29 | 0.223 | A | 0.9794 |
| 345.1 | 28.98 | 0.0518 | A | 0.9794 |
| 321.2 | 31.14 | 0.013 | A | 0.9794 |
| 318.5 | 31.4 | 0.0697 | A | 0.9794 |
| 313.8 | 31.86 | 0.3793 | A | 0.9794 |
| 312.7 | 31.98 | 0.7766 | A | 0.9794 |
| 305.4 | 32.74 | 3.634 | A | 0.9794 |
| 304.2 | 32.88 | 0.0342 | A | 0.9794 |
| 294.9 | 33.91 | 0.7885 | A | 0.9794 |
| 292.8 | 34.15 | 4.642 | A | 0.9794 |
| 292.7 | 34.17 | 0.4218 | A | 0.9794 |
| 282.3 | 35.43 | 0.2318 | A | 0.9794 |
| 279.3 | 35.81 | 0.1184 | A | 0.9794 |
| 265.7 | 37.63 | 2.573 | A | 0.9794 |
| 245.4 | 40.75 | 0.182 | A | 0.9794 |
| 240.3 | 41.61 | 0.021 | A | 0.9794 |
| 239.8 | 41.7 | 0.4618 | A | 0.9794 |
| 237.7 | 42.07 | 0.0823 | A | 0.9794 |
| 236.6 | 42.26 | 0.2235 | A | 0.9794 |
| 214.2 | 46.69 | 0.1291 | A | 0.9794 |
| 205.4 | 48.68 | 0.047 | A | 0.9794 |
| 204.1 | 49.01 | 0.08 | A | 0.9794 |
| 203.3 | 49.2 | 14.92 | A | 0.9794 |
| 202.8 | 49.31 | 13.24 | A | 0.9794 |
| 188.9 | 52.93 | 0.7586 | A | 0.9794 |
| 187.6 | 53.29 | 4.146 | A | 0.9794 |
| 183.6 | 54.45 | 0.1192 | A | 0.9794 |
| 176.3 | 56.73 | 0.0831 | A | 0.9794 |
| 171 | 58.49 | 0.0402 | A | 0.9794 |
| 132.8 | 75.29 | 0.0962 | A | 0.9794 |
| 131.6 | 75.98 | 0.3999 | A | 0.9794 |
| 130.4 | 76.7 | 1.786 | A | 0.9794 |
| 128.1 | 78.07 | 0.1478 | A | 0.9794 |
| 126.9 | 78.82 | 1.066 | A | 0.9794 |
| 85.27 | 117.3 | 0.0539 | A | 0.9794 |
| 84.38 | 118.5 | 0.1326 | A | 0.9794 |
| 72.58 | 137.8 | 0.0489 | A | 0.9794 |
| 70.42 | 142 | 0.056 | A | 0.9794 |
| 59.5 | 168.1 | 0.1084 | A | 0.9794 |
| 45.85 | 218.1 | 0.023 | A | 0.9794 |
| 27.33 | 365.9 | 0.7887 | A | 0.9794 |
| 24.64 | 405.8 | 0.0151 | A | 0.9794 |
| 24.46 | 408.8 | 0.002 | A | 0.9794 |
Note(s):
You are kindly asked to consider the following references for citation when using the database: