| You need a browser with JavaScript support in order to view the molecule in 3D |
|
Transitions — Left-clk & drag: Zoom; Right-clk: reset |
|
νk [cm-1] |
λ [μm] |
int [km/mol] |
symm. | fscale |
|---|---|---|---|---|
| 3105 | 3.221 | 2.45 | A | 0.9597 |
| 3104 | 3.221 | 0.846 | A | 0.9597 |
| 3095 | 3.231 | 0.43 | A | 0.9597 |
| 3092 | 3.234 | 0.594 | A | 0.9597 |
| 3089 | 3.238 | 2.08 | A | 0.9597 |
| 3088 | 3.239 | 2.37 | A | 0.9597 |
| 3085 | 3.241 | 23.6 | A | 0.9597 |
| 3084 | 3.243 | 29.2 | A | 0.9597 |
| 3083 | 3.243 | 35.2 | A | 0.9597 |
| 3083 | 3.244 | 25.7 | A | 0.9597 |
| 3080 | 3.247 | 2.28 | A | 0.9597 |
| 3073 | 3.254 | 3.64 | A | 0.9597 |
| 3073 | 3.254 | 6.13 | A | 0.9597 |
| 3070 | 3.257 | 3.65 | A | 0.9597 |
| 3070 | 3.258 | 0.416 | A | 0.9597 |
| 3069 | 3.258 | 0.642 | A | 0.9597 |
| 3069 | 3.259 | 2.92 | A | 0.9597 |
| 3068 | 3.26 | 6.7 | A | 0.9597 |
| 3067 | 3.261 | 16.9 | A | 0.9597 |
| 3066 | 3.261 | 15.5 | A | 0.9597 |
| 3066 | 3.262 | 2.83 | A | 0.9597 |
| 3064 | 3.263 | 0.416 | A | 0.9597 |
| 3064 | 3.264 | 0.444 | A | 0.9597 |
| 3064 | 3.264 | 0.923 | A | 0.9597 |
| 1640 | 6.098 | 39.6 | A | 0.9691 |
| 1637 | 6.109 | 24.3 | A | 0.9691 |
| 1622 | 6.166 | 28.3 | A | 0.9691 |
| 1619 | 6.177 | 89.6 | A | 0.9691 |
| 1614 | 6.195 | 61.4 | A | 0.9691 |
| 1610 | 6.212 | 9.91 | A | 0.9691 |
| 1606 | 6.227 | 14 | A | 0.9691 |
| 1604 | 6.234 | 37.3 | A | 0.9691 |
| 1602 | 6.241 | 175 | A | 0.9691 |
| 1600 | 6.249 | 43.6 | A | 0.9691 |
| 1598 | 6.26 | 123 | A | 0.9691 |
| 1596 | 6.268 | 69.6 | A | 0.9691 |
| 1591 | 6.284 | 98 | A | 0.9691 |
| 1589 | 6.294 | 39 | A | 0.9691 |
| 1580 | 6.33 | 24.4 | A | 0.9691 |
| 1577 | 6.34 | 4.32 | A | 0.9691 |
| 1575 | 6.35 | 97.8 | A | 0.9691 |
| 1572 | 6.363 | 11.6 | A | 0.9691 |
| 1567 | 6.383 | 60.5 | A | 0.9691 |
| 1562 | 6.402 | 46.9 | A | 0.9691 |
| 1555 | 6.432 | 3.86 | A | 0.9691 |
| 1554 | 6.436 | 6.92 | A | 0.9691 |
| 1552 | 6.443 | 12.2 | A | 0.9691 |
| 1537 | 6.504 | 6.79 | A | 0.9691 |
| 1531 | 6.532 | 6.13 | A | 0.9691 |
| 1524 | 6.563 | 2.51 | A | 0.9691 |
| 1517 | 6.593 | 26.9 | A | 0.9691 |
| 1514 | 6.604 | 8.27 | A | 0.9691 |
| 1509 | 6.627 | 82.3 | A | 0.9691 |
| 1509 | 6.628 | 110 | A | 0.9691 |
| 1502 | 6.658 | 13.5 | A | 0.9691 |
| 1500 | 6.668 | 10.5 | A | 0.9691 |
| 1494 | 6.695 | 57.4 | A | 0.9691 |
| 1486 | 6.731 | 80.5 | A | 0.9691 |
| 1476 | 6.773 | 35 | A | 0.9691 |
| 1473 | 6.787 | 26.2 | A | 0.9691 |
| 1470 | 6.803 | 12.4 | A | 0.9691 |
| 1468 | 6.814 | 19.5 | A | 0.9691 |
| 1467 | 6.818 | 8.69 | A | 0.9691 |
| 1464 | 6.83 | 5.78 | A | 0.9691 |
| 1461 | 6.843 | 3.57 | A | 0.9691 |
| 1457 | 6.864 | 2.52 | A | 0.9691 |
| 1456 | 6.868 | 8.83 | A | 0.9691 |
| 1453 | 6.882 | 1.02 | A | 0.9691 |
| 1445 | 6.919 | 1.94 | A | 0.9691 |
| 1441 | 6.94 | 14.8 | A | 0.9691 |
| 1439 | 6.948 | 7.43 | A | 0.9691 |
| 1434 | 6.974 | 1.64 | A | 0.9691 |
| 1431 | 6.987 | 11.6 | A | 0.9691 |
| 1430 | 6.993 | 5.34 | A | 0.9691 |
| 1426 | 7.012 | 1.63 | A | 0.9691 |
| 1422 | 7.032 | 11.2 | A | 0.9691 |
| 1415 | 7.066 | 7.5 | A | 0.9691 |
| 1413 | 7.077 | 14.6 | A | 0.9691 |
| 1410 | 7.095 | 8.1 | A | 0.9691 |
| 1409 | 7.1 | 13.3 | A | 0.9691 |
| 1406 | 7.112 | 0.695 | A | 0.9691 |
| 1405 | 7.118 | 7.6 | A | 0.9691 |
| 1401 | 7.137 | 7.4 | A | 0.9691 |
| 1400 | 7.143 | 1.27 | A | 0.9691 |
| 1399 | 7.15 | 0.476 | A | 0.9691 |
| 1396 | 7.165 | 1.18 | A | 0.9691 |
| 1393 | 7.18 | 10.4 | A | 0.9691 |
| 1392 | 7.185 | 12 | A | 0.9691 |
| 1391 | 7.188 | 7.02 | A | 0.9691 |
| 1389 | 7.202 | 2.53 | A | 0.9691 |
| 1386 | 7.214 | 2.2 | A | 0.9691 |
| 1384 | 7.227 | 16.8 | A | 0.9691 |
| 1380 | 7.249 | 18.9 | A | 0.9691 |
| 1375 | 7.272 | 1.24 | A | 0.9691 |
| 1374 | 7.276 | 15.5 | A | 0.9691 |
| 1371 | 7.296 | 22.7 | A | 0.9691 |
| 1367 | 7.316 | 13.2 | A | 0.9691 |
| 1363 | 7.338 | 24.5 | A | 0.9691 |
| 1361 | 7.35 | 4.36 | A | 0.9691 |
| 1359 | 7.36 | 1.32 | A | 0.9691 |
| 1358 | 7.361 | 10.4 | A | 0.9691 |
| 1354 | 7.387 | 9.28 | A | 0.9691 |
| 1352 | 7.398 | 20 | A | 0.9691 |
| 1349 | 7.415 | 58.4 | A | 0.9691 |
| 1348 | 7.419 | 16.3 | A | 0.9691 |
| 1338 | 7.477 | 26 | A | 0.9691 |
| 1333 | 7.503 | 39.7 | A | 0.9691 |
| 1328 | 7.531 | 121 | A | 0.9691 |
| 1326 | 7.542 | 9.08 | A | 0.9691 |
| 1325 | 7.545 | 21 | A | 0.9691 |
| 1321 | 7.569 | 8.07 | A | 0.9691 |
| 1317 | 7.591 | 161 | A | 0.9691 |
| 1308 | 7.644 | 43.1 | A | 0.9691 |
| 1298 | 7.706 | 182 | A | 0.9691 |
| 1293 | 7.733 | 73.2 | A | 0.9691 |
| 1292 | 7.741 | 13.7 | A | 0.9691 |
| 1288 | 7.766 | 10.2 | A | 0.9691 |
| 1287 | 7.769 | 87 | A | 0.9691 |
| 1282 | 7.799 | 11 | A | 0.9691 |
| 1277 | 7.832 | 48.1 | A | 0.9691 |
| 1273 | 7.858 | 68.1 | A | 0.9691 |
| 1268 | 7.886 | 25.4 | A | 0.9691 |
| 1266 | 7.897 | 4.21 | A | 0.9691 |
| 1251 | 7.991 | 16.8 | A | 0.9691 |
| 1237 | 8.082 | 3.63 | A | 0.9691 |
| 1220 | 8.194 | 7.19 | A | 0.9691 |
| 1219 | 8.206 | 2.53 | A | 0.9691 |
| 1217 | 8.22 | 19.8 | A | 0.9691 |
| 1213 | 8.242 | 6.08 | A | 0.9691 |
| 1211 | 8.257 | 10.1 | A | 0.9691 |
| 1210 | 8.263 | 23.1 | A | 0.9691 |
| 1208 | 8.281 | 16.6 | A | 0.9691 |
| 1206 | 8.292 | 1.36 | A | 0.9691 |
| 1193 | 8.384 | 18.8 | A | 0.9691 |
| 1191 | 8.395 | 40.8 | A | 0.9691 |
| 1189 | 8.412 | 0.366 | A | 0.9691 |
| 1186 | 8.43 | 0.73 | A | 0.9691 |
| 1184 | 8.443 | 25.8 | A | 0.9691 |
| 1176 | 8.506 | 0.223 | A | 0.9691 |
| 1170 | 8.547 | 9.83 | A | 0.9691 |
| 1169 | 8.556 | 7.95 | A | 0.9691 |
| 1164 | 8.588 | 38.4 | A | 0.9691 |
| 1163 | 8.599 | 8.22 | A | 0.9691 |
| 1159 | 8.627 | 0.946 | A | 0.9691 |
| 1155 | 8.659 | 36.2 | A | 0.9691 |
| 1152 | 8.68 | 8.33 | A | 0.9691 |
| 1136 | 8.805 | 1.28 | A | 0.9691 |
| 1128 | 8.863 | 0.505 | A | 0.9691 |
| 1121 | 8.923 | 11 | A | 0.9691 |
| 1120 | 8.929 | 6.72 | A | 0.9691 |
| 1100 | 9.087 | 0.0495 | A | 0.9691 |
| 1084 | 9.225 | 7.09 | A | 0.9794 |
| 1083 | 9.231 | 8.73 | A | 0.9794 |
| 1080 | 9.257 | 4.61 | A | 0.9794 |
| 1080 | 9.26 | 12.4 | A | 0.9794 |
| 1054 | 9.488 | 0.0063 | A | 0.9794 |
| 1049 | 9.534 | 1.6 | A | 0.9794 |
| 1047 | 9.551 | 3.24 | A | 0.9794 |
| 1045 | 9.57 | 1.91 | A | 0.9794 |
| 1044 | 9.578 | 7.44 | A | 0.9794 |
| 1038 | 9.633 | 2.95 | A | 0.9794 |
| 979 | 10.21 | 0.27 | A | 0.9794 |
| 978.2 | 10.22 | 0.111 | A | 0.9794 |
| 976.3 | 10.24 | 0.118 | A | 0.9794 |
| 975.2 | 10.25 | 0.0627 | A | 0.9794 |
| 974 | 10.27 | 0.067 | A | 0.9794 |
| 973 | 10.28 | 0.0027 | A | 0.9794 |
| 969.9 | 10.31 | 0.197 | A | 0.9794 |
| 965.3 | 10.36 | 0.3 | A | 0.9794 |
| 944.8 | 10.58 | 0.227 | A | 0.9794 |
| 943.5 | 10.6 | 0.604 | A | 0.9794 |
| 931.5 | 10.73 | 1.79 | A | 0.9794 |
| 920.2 | 10.87 | 0.192 | A | 0.9794 |
| 919.7 | 10.87 | 154 | A | 0.9794 |
| 917.1 | 10.9 | 16.7 | A | 0.9794 |
| 916 | 10.92 | 1.68 | A | 0.9794 |
| 914.8 | 10.93 | 4.53 | A | 0.9794 |
| 913.8 | 10.94 | 19.4 | A | 0.9794 |
| 910.2 | 10.99 | 11.9 | A | 0.9794 |
| 900.6 | 11.1 | 62.7 | A | 0.9794 |
| 891.2 | 11.22 | 16.8 | A | 0.9794 |
| 888.9 | 11.25 | 0.11 | A | 0.9794 |
| 887.1 | 11.27 | 0.206 | A | 0.9794 |
| 885.2 | 11.3 | 0.66 | A | 0.9794 |
| 883 | 11.32 | 0.336 | A | 0.9794 |
| 876.7 | 11.41 | 0.0373 | A | 0.9794 |
| 871.6 | 11.47 | 0.344 | A | 0.9794 |
| 865 | 11.56 | 0.214 | A | 0.9794 |
| 861.1 | 11.61 | 3.18 | A | 0.9794 |
| 849.4 | 11.77 | 0.335 | A | 0.9794 |
| 829.9 | 12.05 | 2.12 | A | 0.9794 |
| 829.6 | 12.05 | 0.418 | A | 0.9794 |
| 812.5 | 12.31 | 55.9 | A | 0.9794 |
| 811.6 | 12.32 | 0.144 | A | 0.9794 |
| 807.8 | 12.38 | 0.905 | A | 0.9794 |
| 806 | 12.41 | 0.84 | A | 0.9794 |
| 799.8 | 12.5 | 5.75 | A | 0.9794 |
| 799.1 | 12.51 | 6.18 | A | 0.9794 |
| 798.8 | 12.52 | 0.668 | A | 0.9794 |
| 797.7 | 12.54 | 0.0609 | A | 0.9794 |
| 797.2 | 12.54 | 10.7 | A | 0.9794 |
| 795.7 | 12.57 | 9.29 | A | 0.9794 |
| 791.4 | 12.64 | 0.232 | A | 0.9794 |
| 781.5 | 12.8 | 0.757 | A | 0.9794 |
| 776.8 | 12.87 | 0.0932 | A | 0.9794 |
| 775.8 | 12.89 | 0.0457 | A | 0.9794 |
| 753.9 | 13.26 | 0.0551 | A | 0.9794 |
| 747.4 | 13.38 | 0.162 | A | 0.9794 |
| 746.5 | 13.4 | 0.139 | A | 0.9794 |
| 745.3 | 13.42 | 0.436 | A | 0.9794 |
| 741.2 | 13.49 | 0.0189 | A | 0.9794 |
| 739 | 13.53 | 0.0086 | A | 0.9794 |
| 737.1 | 13.57 | 0.0085 | A | 0.9794 |
| 733.6 | 13.63 | 0.0049 | A | 0.9794 |
| 729.4 | 13.71 | 0.128 | A | 0.9794 |
| 728 | 13.74 | 0.424 | A | 0.9794 |
| 716.9 | 13.95 | 0.116 | A | 0.9794 |
| 716.3 | 13.96 | 0.147 | A | 0.9794 |
| 715.9 | 13.97 | 0.0115 | A | 0.9794 |
| 715.6 | 13.97 | 0.457 | A | 0.9794 |
| 712.6 | 14.03 | 4.31 | A | 0.9794 |
| 709.5 | 14.09 | 0.0937 | A | 0.9794 |
| 708.7 | 14.11 | 0.393 | A | 0.9794 |
| 706 | 14.16 | 0.363 | A | 0.9794 |
| 698.4 | 14.32 | 0.0288 | A | 0.9794 |
| 679.5 | 14.72 | 0.0008 | A | 0.9794 |
| 669.8 | 14.93 | 0.606 | A | 0.9794 |
| 668.8 | 14.95 | 0.0448 | A | 0.9794 |
| 663.3 | 15.08 | 0.0196 | A | 0.9794 |
| 660.1 | 15.15 | 0.0221 | A | 0.9794 |
| 652.9 | 15.32 | 0.307 | A | 0.9794 |
| 652.6 | 15.32 | 0.428 | A | 0.9794 |
| 647.7 | 15.44 | 0.309 | A | 0.9794 |
| 646.8 | 15.46 | 0.776 | A | 0.9794 |
| 646 | 15.48 | 0.0053 | A | 0.9794 |
| 644.3 | 15.52 | 0.469 | A | 0.9794 |
| 636.7 | 15.71 | 0.393 | A | 0.9794 |
| 634.8 | 15.75 | 0.0229 | A | 0.9794 |
| 634.5 | 15.76 | 0.142 | A | 0.9794 |
| 633.5 | 15.78 | 0.0658 | A | 0.9794 |
| 631.7 | 15.83 | 0.0998 | A | 0.9794 |
| 631.6 | 15.83 | 0.139 | A | 0.9794 |
| 629.2 | 15.89 | 0.0816 | A | 0.9794 |
| 628.2 | 15.92 | 0.0933 | A | 0.9794 |
| 624.2 | 16.02 | 1.09 | A | 0.9794 |
| 615.2 | 16.26 | 0.0292 | A | 0.9794 |
| 610.5 | 16.38 | 0.0387 | A | 0.9794 |
| 609.2 | 16.41 | 0.906 | A | 0.9794 |
| 604.7 | 16.54 | 0.738 | A | 0.9794 |
| 602 | 16.61 | 10.1 | A | 0.9794 |
| 597.2 | 16.74 | 0.248 | A | 0.9794 |
| 596.6 | 16.76 | 0.0627 | A | 0.9794 |
| 595.4 | 16.8 | 0.228 | A | 0.9794 |
| 593.6 | 16.85 | 0.37 | A | 0.9794 |
| 591.8 | 16.9 | 0.0127 | A | 0.9794 |
| 589.4 | 16.97 | 0.144 | A | 0.9794 |
| 587.2 | 17.03 | 1.5 | A | 0.9794 |
| 587 | 17.04 | 6.29 | A | 0.9794 |
| 584.9 | 17.1 | 5.37 | A | 0.9794 |
| 582.4 | 17.17 | 0.0094 | A | 0.9794 |
| 575.4 | 17.38 | 1.71 | A | 0.9794 |
| 574.7 | 17.4 | 0.393 | A | 0.9794 |
| 572.9 | 17.45 | 0.226 | A | 0.9794 |
| 571.3 | 17.5 | 2.72 | A | 0.9794 |
| 569.5 | 17.56 | 3.33 | A | 0.9794 |
| 567.9 | 17.61 | 7.01 | A | 0.9794 |
| 564 | 17.73 | 0.0005 | A | 0.9794 |
| 555.9 | 17.99 | 0.0757 | A | 0.9794 |
| 552.3 | 18.11 | 0.526 | A | 0.9794 |
| 551.2 | 18.14 | 0.182 | A | 0.9794 |
| 550.7 | 18.16 | 0.0813 | A | 0.9794 |
| 547.6 | 18.26 | 0.655 | A | 0.9794 |
| 539.7 | 18.53 | 0.484 | A | 0.9794 |
| 538.6 | 18.57 | 0.509 | A | 0.9794 |
| 535.1 | 18.69 | 0.0017 | A | 0.9794 |
| 516.9 | 19.35 | 0.0219 | A | 0.9794 |
| 514.2 | 19.45 | 0.0052 | A | 0.9794 |
| 508 | 19.69 | 0.218 | A | 0.9794 |
| 506.9 | 19.73 | 0.36 | A | 0.9794 |
| 502.5 | 19.9 | 0.0806 | A | 0.9794 |
| 500.8 | 19.97 | 0.468 | A | 0.9794 |
| 499.7 | 20.01 | 1.71 | A | 0.9794 |
| 497.2 | 20.11 | 0.589 | A | 0.9794 |
| 496.1 | 20.16 | 0.257 | A | 0.9794 |
| 490.8 | 20.37 | 0.519 | A | 0.9794 |
| 478.1 | 20.92 | 0.136 | A | 0.9794 |
| 475.1 | 21.05 | 0.553 | A | 0.9794 |
| 447.1 | 22.37 | 0.0067 | A | 0.9794 |
| 445 | 22.47 | 0.0004 | A | 0.9794 |
| 443.3 | 22.56 | 0.246 | A | 0.9794 |
| 440.4 | 22.71 | 0.392 | A | 0.9794 |
| 432.3 | 23.13 | 0.0005 | A | 0.9794 |
| 432 | 23.15 | 1.25 | A | 0.9794 |
| 431.5 | 23.18 | 1.62 | A | 0.9794 |
| 423.6 | 23.61 | 0.0102 | A | 0.9794 |
| 422.2 | 23.68 | 0.0142 | A | 0.9794 |
| 416.7 | 24 | 0.0014 | A | 0.9794 |
| 413.8 | 24.16 | 0.0013 | A | 0.9794 |
| 407.9 | 24.52 | 0.0011 | A | 0.9794 |
| 405.8 | 24.64 | 0.006 | A | 0.9794 |
| 405.1 | 24.69 | 0.0047 | A | 0.9794 |
| 401.8 | 24.89 | 0.0022 | A | 0.9794 |
| 400.9 | 24.95 | 4.61 | A | 0.9794 |
| 400.3 | 24.98 | 3.09 | A | 0.9794 |
| 387.4 | 25.81 | 0.331 | A | 0.9794 |
| 373.7 | 26.76 | 0.0003 | A | 0.9794 |
| 373.6 | 26.77 | 0.0744 | A | 0.9794 |
| 371.1 | 26.94 | 0.0229 | A | 0.9794 |
| 366.8 | 27.27 | 0.633 | A | 0.9794 |
| 359.4 | 27.82 | 0.312 | A | 0.9794 |
| 358.3 | 27.91 | 0.667 | A | 0.9794 |
| 356.1 | 28.08 | 0.0002 | A | 0.9794 |
| 335.1 | 29.84 | 0.0043 | A | 0.9794 |
| 320.9 | 31.16 | 0.236 | A | 0.9794 |
| 318.2 | 31.43 | 0.0481 | A | 0.9794 |
| 313.4 | 31.91 | 0.155 | A | 0.9794 |
| 312.8 | 31.97 | 0.0117 | A | 0.9794 |
| 308.6 | 32.41 | 7.23 | A | 0.9794 |
| 302.5 | 33.06 | 0.0114 | A | 0.9794 |
| 295.3 | 33.86 | 0.0028 | A | 0.9794 |
| 293.5 | 34.07 | 0.0487 | A | 0.9794 |
| 292.8 | 34.15 | 0.347 | A | 0.9794 |
| 278.9 | 35.86 | 0.0015 | A | 0.9794 |
| 275.7 | 36.27 | 0.0129 | A | 0.9794 |
| 265.1 | 37.73 | 0.104 | A | 0.9794 |
| 245.5 | 40.74 | 0.0012 | A | 0.9794 |
| 240.3 | 41.62 | 0.0012 | A | 0.9794 |
| 238.6 | 41.91 | 0.0015 | A | 0.9794 |
| 235.9 | 42.38 | 0.0296 | A | 0.9794 |
| 234.8 | 42.59 | 0.0032 | A | 0.9794 |
| 212.5 | 47.05 | 0.001 | A | 0.9794 |
| 203.7 | 49.1 | 5.31 | A | 0.9794 |
| 203.3 | 49.19 | 6.9 | A | 0.9794 |
| 202.5 | 49.37 | 0.0004 | A | 0.9794 |
| 202.3 | 49.42 | 0.0041 | A | 0.9794 |
| 189.3 | 52.82 | 0.169 | A | 0.9794 |
| 188.3 | 53.12 | 1.45 | A | 0.9794 |
| 178.4 | 56.07 | 0.0241 | A | 0.9794 |
| 175 | 57.13 | 0.006 | A | 0.9794 |
| 172 | 58.15 | 0.432 | A | 0.9794 |
| 134.6 | 74.28 | 0.0203 | A | 0.9794 |
| 131.1 | 76.3 | 0.281 | A | 0.9794 |
| 129.5 | 77.2 | 2.69 | A | 0.9794 |
| 123.8 | 80.8 | 0.0058 | A | 0.9794 |
| 121.2 | 82.52 | 1.49 | A | 0.9794 |
| 82.07 | 121.9 | 0.0631 | A | 0.9794 |
| 81.09 | 123.3 | 0.0042 | A | 0.9794 |
| 73.7 | 135.7 | 0.0038 | A | 0.9794 |
| 71.29 | 140.3 | 0.0003 | A | 0.9794 |
| 57.02 | 175.4 | 0.0004 | A | 0.9794 |
| 43.26 | 231.1 | 0.0002 | A | 0.9794 |
| 28.8 | 347.3 | 3.8 | A | 0.9794 |
| 23.24 | 430.4 | 0.0355 | A | 0.9794 |
| 22.97 | 435.4 | 0.0092 | A | 0.9794 |
Note(s):
You are kindly asked to consider the following references for citation when using the database: