| 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 |
|---|---|---|---|---|
| 3086 | 3.24 | 26.5 | A | 0.9597 |
| 3086 | 3.241 | 30.3 | A | 0.9597 |
| 3085 | 3.241 | 31.1 | A | 0.9597 |
| 3085 | 3.242 | 22.1 | A | 0.9597 |
| 3085 | 3.242 | 28.1 | A | 0.9597 |
| 3083 | 3.244 | 21.2 | A | 0.9597 |
| 3073 | 3.254 | 0.504 | A | 0.9597 |
| 3072 | 3.255 | 0.689 | A | 0.9597 |
| 3071 | 3.256 | 0.311 | A | 0.9597 |
| 3071 | 3.256 | 4.47 | A | 0.9597 |
| 3071 | 3.256 | 6.82 | A | 0.9597 |
| 3071 | 3.257 | 3.06 | A | 0.9597 |
| 3069 | 3.258 | 6.24 | A | 0.9597 |
| 3069 | 3.258 | 26.6 | A | 0.9597 |
| 3069 | 3.259 | 21.8 | A | 0.9597 |
| 3068 | 3.259 | 7.07 | A | 0.9597 |
| 3068 | 3.26 | 4.15 | A | 0.9597 |
| 3067 | 3.26 | 0.201 | A | 0.9597 |
| 3066 | 3.261 | 0.312 | A | 0.9597 |
| 3066 | 3.261 | 0.441 | A | 0.9597 |
| 3066 | 3.262 | 0.209 | A | 0.9597 |
| 3066 | 3.262 | 0.622 | A | 0.9597 |
| 3065 | 3.262 | 0.5 | A | 0.9597 |
| 3065 | 3.263 | 2.39 | A | 0.9597 |
| 2682 | 3.728 | 38.2 | A | 0.9597 |
| 1642 | 6.089 | 22.3 | A | 0.9691 |
| 1612 | 6.205 | 88.8 | A | 0.9691 |
| 1609 | 6.216 | 73.9 | A | 0.9691 |
| 1605 | 6.23 | 65.4 | A | 0.9691 |
| 1600 | 6.248 | 188 | A | 0.9691 |
| 1598 | 6.259 | 326 | A | 0.9691 |
| 1595 | 6.271 | 74.6 | A | 0.9691 |
| 1594 | 6.273 | 116 | A | 0.9691 |
| 1594 | 6.275 | 135 | A | 0.9691 |
| 1590 | 6.288 | 8.94 | A | 0.9691 |
| 1589 | 6.292 | 285 | A | 0.9691 |
| 1586 | 6.304 | 70.2 | A | 0.9691 |
| 1575 | 6.348 | 62.6 | A | 0.9691 |
| 1574 | 6.353 | 86.1 | A | 0.9691 |
| 1571 | 6.365 | 68.8 | A | 0.9691 |
| 1565 | 6.391 | 42.7 | A | 0.9691 |
| 1560 | 6.41 | 85.3 | A | 0.9691 |
| 1559 | 6.414 | 136 | A | 0.9691 |
| 1556 | 6.427 | 41.5 | A | 0.9691 |
| 1551 | 6.449 | 179 | A | 0.9691 |
| 1545 | 6.473 | 37.3 | A | 0.9691 |
| 1543 | 6.48 | 16 | A | 0.9691 |
| 1535 | 6.517 | 57.5 | A | 0.9691 |
| 1531 | 6.532 | 10.7 | A | 0.9691 |
| 1525 | 6.558 | 47.3 | A | 0.9691 |
| 1518 | 6.588 | 33.8 | A | 0.9691 |
| 1512 | 6.614 | 4.15 | A | 0.9691 |
| 1509 | 6.627 | 0.967 | A | 0.9691 |
| 1504 | 6.648 | 161 | A | 0.9691 |
| 1496 | 6.683 | 37 | A | 0.9691 |
| 1493 | 6.697 | 76.5 | A | 0.9691 |
| 1491 | 6.705 | 25.7 | A | 0.9691 |
| 1484 | 6.738 | 172 | A | 0.9691 |
| 1481 | 6.753 | 12.7 | A | 0.9691 |
| 1472 | 6.796 | 558 | A | 0.9691 |
| 1470 | 6.801 | 45.5 | A | 0.9691 |
| 1468 | 6.813 | 1.68 | A | 0.9691 |
| 1465 | 6.827 | 21.8 | A | 0.9691 |
| 1461 | 6.847 | 170 | A | 0.9691 |
| 1457 | 6.866 | 141 | A | 0.9691 |
| 1454 | 6.877 | 16.4 | A | 0.9691 |
| 1452 | 6.885 | 74.8 | A | 0.9691 |
| 1451 | 6.891 | 14.3 | A | 0.9691 |
| 1443 | 6.93 | 32.3 | A | 0.9691 |
| 1442 | 6.937 | 2.78 | A | 0.9691 |
| 1439 | 6.95 | 169 | A | 0.9691 |
| 1436 | 6.964 | 4.73 | A | 0.9691 |
| 1433 | 6.978 | 146 | A | 0.9691 |
| 1427 | 7.009 | 13.5 | A | 0.9691 |
| 1424 | 7.024 | 3.44 | A | 0.9691 |
| 1420 | 7.04 | 45.5 | A | 0.9691 |
| 1417 | 7.056 | 35.4 | A | 0.9691 |
| 1416 | 7.06 | 12.3 | A | 0.9691 |
| 1414 | 7.071 | 24.6 | A | 0.9691 |
| 1411 | 7.088 | 17.4 | A | 0.9691 |
| 1408 | 7.101 | 20.4 | A | 0.9691 |
| 1407 | 7.109 | 12.2 | A | 0.9691 |
| 1402 | 7.134 | 20.3 | A | 0.9691 |
| 1401 | 7.137 | 36.8 | A | 0.9691 |
| 1400 | 7.144 | 0.689 | A | 0.9691 |
| 1398 | 7.155 | 73.4 | A | 0.9691 |
| 1396 | 7.165 | 7.46 | A | 0.9691 |
| 1393 | 7.181 | 0.587 | A | 0.9691 |
| 1391 | 7.189 | 11.1 | A | 0.9691 |
| 1390 | 7.194 | 10.9 | A | 0.9691 |
| 1389 | 7.202 | 17.4 | A | 0.9691 |
| 1386 | 7.215 | 0.302 | A | 0.9691 |
| 1384 | 7.224 | 28.9 | A | 0.9691 |
| 1379 | 7.252 | 13.9 | A | 0.9691 |
| 1378 | 7.258 | 11.5 | A | 0.9691 |
| 1376 | 7.269 | 7.71 | A | 0.9691 |
| 1374 | 7.28 | 4.74 | A | 0.9691 |
| 1371 | 7.295 | 9.31 | A | 0.9691 |
| 1368 | 7.307 | 125 | A | 0.9691 |
| 1366 | 7.319 | 30.2 | A | 0.9691 |
| 1358 | 7.366 | 26.3 | A | 0.9691 |
| 1353 | 7.388 | 1.24 | A | 0.9691 |
| 1351 | 7.4 | 114 | A | 0.9691 |
| 1349 | 7.41 | 38.1 | A | 0.9691 |
| 1345 | 7.434 | 19.7 | A | 0.9691 |
| 1343 | 7.448 | 41.2 | A | 0.9691 |
| 1335 | 7.491 | 455 | A | 0.9691 |
| 1333 | 7.501 | 139 | A | 0.9691 |
| 1323 | 7.56 | 153 | A | 0.9691 |
| 1320 | 7.577 | 4.4 | A | 0.9691 |
| 1318 | 7.588 | 123 | A | 0.9691 |
| 1316 | 7.599 | 430 | A | 0.9691 |
| 1310 | 7.636 | 150 | A | 0.9691 |
| 1304 | 7.669 | 19.6 | A | 0.9691 |
| 1301 | 7.684 | 406 | A | 0.9691 |
| 1297 | 7.709 | 19.2 | A | 0.9691 |
| 1286 | 7.774 | 24.7 | A | 0.9691 |
| 1284 | 7.785 | 40.1 | A | 0.9691 |
| 1283 | 7.797 | 171 | A | 0.9691 |
| 1281 | 7.808 | 1.71 | A | 0.9691 |
| 1275 | 7.845 | 57.7 | A | 0.9691 |
| 1273 | 7.858 | 1.05 | A | 0.9691 |
| 1268 | 7.884 | 14.1 | A | 0.9691 |
| 1264 | 7.913 | 3.86 | A | 0.9691 |
| 1258 | 7.952 | 76.4 | A | 0.9691 |
| 1235 | 8.1 | 5.82 | A | 0.9691 |
| 1220 | 8.197 | 3.85 | A | 0.9691 |
| 1214 | 8.238 | 4.72 | A | 0.9691 |
| 1212 | 8.249 | 16.1 | A | 0.9691 |
| 1211 | 8.26 | 1.21 | A | 0.9691 |
| 1209 | 8.27 | 12.8 | A | 0.9691 |
| 1204 | 8.307 | 149 | A | 0.9691 |
| 1203 | 8.315 | 83.4 | A | 0.9691 |
| 1195 | 8.365 | 16.8 | A | 0.9691 |
| 1187 | 8.423 | 16.8 | A | 0.9691 |
| 1186 | 8.431 | 2.1 | A | 0.9691 |
| 1182 | 8.46 | 51.6 | A | 0.9691 |
| 1178 | 8.488 | 178 | A | 0.9691 |
| 1175 | 8.508 | 87.3 | A | 0.9691 |
| 1172 | 8.533 | 98.1 | A | 0.9691 |
| 1167 | 8.566 | 3.25 | A | 0.9691 |
| 1166 | 8.577 | 29.2 | A | 0.9691 |
| 1164 | 8.595 | 9.63 | A | 0.9691 |
| 1160 | 8.622 | 36.2 | A | 0.9691 |
| 1155 | 8.655 | 14.7 | A | 0.9691 |
| 1146 | 8.726 | 2.79 | A | 0.9691 |
| 1131 | 8.839 | 14.7 | A | 0.9691 |
| 1126 | 8.885 | 485 | A | 0.9691 |
| 1121 | 8.919 | 566 | A | 0.9691 |
| 1117 | 8.95 | 48.8 | A | 0.9691 |
| 1113 | 8.982 | 100 | A | 0.9691 |
| 1094 | 9.141 | 6.22 | A | 0.9691 |
| 1082 | 9.24 | 50.6 | A | 0.9691 |
| 1081 | 9.246 | 35.7 | A | 0.9794 |
| 1081 | 9.25 | 45.9 | A | 0.9794 |
| 1078 | 9.273 | 18 | A | 0.9794 |
| 1066 | 9.38 | 78.6 | A | 0.9794 |
| 1057 | 9.463 | 10.6 | A | 0.9794 |
| 1050 | 9.524 | 3.56 | A | 0.9794 |
| 1043 | 9.584 | 5.56 | A | 0.9794 |
| 1041 | 9.606 | 23.8 | A | 0.9794 |
| 1039 | 9.628 | 0.882 | A | 0.9794 |
| 1034 | 9.675 | 10.1 | A | 0.9794 |
| 1010 | 9.898 | 3.96 | A | 0.9794 |
| 975.4 | 10.25 | 0.182 | A | 0.9794 |
| 974.8 | 10.26 | 0.797 | A | 0.9794 |
| 974.3 | 10.26 | 0.832 | A | 0.9794 |
| 973.8 | 10.27 | 1.74 | A | 0.9794 |
| 973.2 | 10.28 | 0.0139 | A | 0.9794 |
| 972.2 | 10.29 | 0.0085 | A | 0.9794 |
| 963.3 | 10.38 | 8.84 | A | 0.9794 |
| 958.1 | 10.44 | 5.76 | A | 0.9794 |
| 941.6 | 10.62 | 1.68 | A | 0.9794 |
| 937.7 | 10.66 | 3.58 | A | 0.9794 |
| 930.4 | 10.75 | 1.91 | A | 0.9794 |
| 922.1 | 10.85 | 115 | A | 0.9794 |
| 919.1 | 10.88 | 83.8 | A | 0.9794 |
| 915.6 | 10.92 | 3.81 | A | 0.9794 |
| 915.2 | 10.93 | 2.99 | A | 0.9794 |
| 912.8 | 10.96 | 15.5 | A | 0.9794 |
| 911.9 | 10.97 | 1.79 | A | 0.9794 |
| 910.7 | 10.98 | 13.2 | A | 0.9794 |
| 908.8 | 11 | 12.9 | A | 0.9794 |
| 901.2 | 11.1 | 15.9 | A | 0.9794 |
| 884.4 | 11.31 | 0.586 | A | 0.9794 |
| 883.8 | 11.31 | 1.84 | A | 0.9794 |
| 882.5 | 11.33 | 3.51 | A | 0.9794 |
| 879.4 | 11.37 | 3.83 | A | 0.9794 |
| 878.4 | 11.38 | 5.77 | A | 0.9794 |
| 873.2 | 11.45 | 0.0543 | A | 0.9794 |
| 868.5 | 11.51 | 1.17 | A | 0.9794 |
| 864.6 | 11.57 | 0.396 | A | 0.9794 |
| 854.6 | 11.7 | 14.9 | A | 0.9794 |
| 827.7 | 12.08 | 2.84 | A | 0.9794 |
| 823.6 | 12.14 | 1.88 | A | 0.9794 |
| 811.8 | 12.32 | 48.2 | A | 0.9794 |
| 808.4 | 12.37 | 0.45 | A | 0.9794 |
| 807.8 | 12.38 | 1.81 | A | 0.9794 |
| 803.9 | 12.44 | 3.53 | A | 0.9794 |
| 799.8 | 12.5 | 0.996 | A | 0.9794 |
| 797.9 | 12.53 | 1.57 | A | 0.9794 |
| 797.3 | 12.54 | 15.6 | A | 0.9794 |
| 796.8 | 12.55 | 2.03 | A | 0.9794 |
| 795 | 12.58 | 3.62 | A | 0.9794 |
| 788 | 12.69 | 6.19 | A | 0.9794 |
| 777.2 | 12.87 | 1.07 | A | 0.9794 |
| 773.4 | 12.93 | 6.25 | A | 0.9794 |
| 771.1 | 12.97 | 2.03 | A | 0.9794 |
| 765.7 | 13.06 | 6.92 | A | 0.9794 |
| 753.2 | 13.28 | 12.2 | A | 0.9794 |
| 749.4 | 13.34 | 13.5 | A | 0.9794 |
| 744.6 | 13.43 | 3.15 | A | 0.9794 |
| 742.8 | 13.46 | 1.38 | A | 0.9794 |
| 739.6 | 13.52 | 0.516 | A | 0.9794 |
| 738.2 | 13.55 | 0.0194 | A | 0.9794 |
| 735.7 | 13.59 | 0.0134 | A | 0.9794 |
| 734.9 | 13.61 | 0.0019 | A | 0.9794 |
| 733.2 | 13.64 | 0.0319 | A | 0.9794 |
| 728.3 | 13.73 | 0.258 | A | 0.9794 |
| 719.7 | 13.89 | 4.13 | A | 0.9794 |
| 715 | 13.99 | 0.168 | A | 0.9794 |
| 712.9 | 14.03 | 0.155 | A | 0.9794 |
| 710.3 | 14.08 | 1.75 | A | 0.9794 |
| 707.9 | 14.13 | 4.31 | A | 0.9794 |
| 705.6 | 14.17 | 1.27 | A | 0.9794 |
| 703.7 | 14.21 | 1.79 | A | 0.9794 |
| 700.2 | 14.28 | 0.219 | A | 0.9794 |
| 695.9 | 14.37 | 2.69 | A | 0.9794 |
| 677.5 | 14.76 | 1.57 | A | 0.9794 |
| 667.2 | 14.99 | 2.25 | A | 0.9794 |
| 664.7 | 15.04 | 0.156 | A | 0.9794 |
| 660 | 15.15 | 2.16 | A | 0.9794 |
| 655.1 | 15.26 | 3.69 | A | 0.9794 |
| 647.8 | 15.44 | 0.19 | A | 0.9794 |
| 645.5 | 15.49 | 0.423 | A | 0.9794 |
| 644 | 15.53 | 3.61 | A | 0.9794 |
| 643.5 | 15.54 | 2.14 | A | 0.9794 |
| 640.9 | 15.6 | 2.52 | A | 0.9794 |
| 638.1 | 15.67 | 1.34 | A | 0.9794 |
| 630.7 | 15.86 | 0.143 | A | 0.9794 |
| 629.2 | 15.89 | 0.65 | A | 0.9794 |
| 628.6 | 15.91 | 1.42 | A | 0.9794 |
| 627.1 | 15.95 | 0.591 | A | 0.9794 |
| 625.7 | 15.98 | 0.157 | A | 0.9794 |
| 624.2 | 16.02 | 0.649 | A | 0.9794 |
| 623.6 | 16.04 | 0.261 | A | 0.9794 |
| 619.6 | 16.14 | 2.13 | A | 0.9794 |
| 614.4 | 16.28 | 0.103 | A | 0.9794 |
| 609.4 | 16.41 | 0.23 | A | 0.9794 |
| 606.5 | 16.49 | 4.58 | A | 0.9794 |
| 603.1 | 16.58 | 0.418 | A | 0.9794 |
| 597.2 | 16.75 | 12.1 | A | 0.9794 |
| 595.1 | 16.8 | 0.188 | A | 0.9794 |
| 591.6 | 16.9 | 1.32 | A | 0.9794 |
| 591.3 | 16.91 | 0.692 | A | 0.9794 |
| 590.1 | 16.95 | 0.0527 | A | 0.9794 |
| 587.8 | 17.01 | 1.39 | A | 0.9794 |
| 585.4 | 17.08 | 1.45 | A | 0.9794 |
| 583.7 | 17.13 | 3.62 | A | 0.9794 |
| 582.1 | 17.18 | 0.779 | A | 0.9794 |
| 578.6 | 17.28 | 0.601 | A | 0.9794 |
| 577.5 | 17.31 | 2.26 | A | 0.9794 |
| 576.3 | 17.35 | 5.77 | A | 0.9794 |
| 573.7 | 17.43 | 3.88 | A | 0.9794 |
| 571.7 | 17.49 | 0.359 | A | 0.9794 |
| 569.8 | 17.55 | 5.99 | A | 0.9794 |
| 565.6 | 17.68 | 2.96 | A | 0.9794 |
| 558.8 | 17.9 | 16.3 | A | 0.9794 |
| 554.7 | 18.03 | 4.47 | A | 0.9794 |
| 553.6 | 18.06 | 1.53 | A | 0.9794 |
| 549.7 | 18.19 | 1.65 | A | 0.9794 |
| 548.5 | 18.23 | 3.55 | A | 0.9794 |
| 546.3 | 18.3 | 16.4 | A | 0.9794 |
| 541.4 | 18.47 | 0.763 | A | 0.9794 |
| 537 | 18.62 | 0.128 | A | 0.9794 |
| 535.3 | 18.68 | 0.793 | A | 0.9794 |
| 533.9 | 18.73 | 3.17 | A | 0.9794 |
| 530.3 | 18.86 | 7.95 | A | 0.9794 |
| 516.8 | 19.35 | 1.64 | A | 0.9794 |
| 510.5 | 19.59 | 1.49 | A | 0.9794 |
| 504.9 | 19.81 | 0.999 | A | 0.9794 |
| 502.9 | 19.88 | 1.41 | A | 0.9794 |
| 498.3 | 20.07 | 0.144 | A | 0.9794 |
| 496.3 | 20.15 | 3.25 | A | 0.9794 |
| 489.9 | 20.41 | 1.85 | A | 0.9794 |
| 486.9 | 20.54 | 0.627 | A | 0.9794 |
| 470.9 | 21.24 | 1.18 | A | 0.9794 |
| 447.1 | 22.37 | 0.807 | A | 0.9794 |
| 443.9 | 22.53 | 0.356 | A | 0.9794 |
| 438.7 | 22.79 | 1.86 | A | 0.9794 |
| 437.2 | 22.88 | 0.168 | A | 0.9794 |
| 434.5 | 23.01 | 0.739 | A | 0.9794 |
| 431.8 | 23.16 | 2.54 | A | 0.9794 |
| 429.6 | 23.28 | 1.1 | A | 0.9794 |
| 424 | 23.59 | 0.105 | A | 0.9794 |
| 422.8 | 23.65 | 0.183 | A | 0.9794 |
| 421.1 | 23.75 | 0.723 | A | 0.9794 |
| 418.5 | 23.9 | 0.015 | A | 0.9794 |
| 414.8 | 24.11 | 0.365 | A | 0.9794 |
| 411 | 24.33 | 0.16 | A | 0.9794 |
| 408.4 | 24.48 | 0.0435 | A | 0.9794 |
| 405.7 | 24.65 | 0.118 | A | 0.9794 |
| 402.8 | 24.83 | 1.54 | A | 0.9794 |
| 399.1 | 25.06 | 0.247 | A | 0.9794 |
| 398.7 | 25.08 | 0.42 | A | 0.9794 |
| 396 | 25.25 | 2.68 | A | 0.9794 |
| 384.2 | 26.03 | 1.24 | A | 0.9794 |
| 373.4 | 26.78 | 0.785 | A | 0.9794 |
| 370.9 | 26.96 | 0.155 | A | 0.9794 |
| 367.1 | 27.24 | 3.71 | A | 0.9794 |
| 362 | 27.62 | 0.0684 | A | 0.9794 |
| 360.4 | 27.75 | 0.114 | A | 0.9794 |
| 358.1 | 27.93 | 0.134 | A | 0.9794 |
| 355.9 | 28.1 | 0.921 | A | 0.9794 |
| 355.4 | 28.13 | 0.0265 | A | 0.9794 |
| 331.7 | 30.14 | 3.26 | A | 0.9794 |
| 319 | 31.35 | 0.0642 | A | 0.9794 |
| 316.6 | 31.58 | 0.105 | A | 0.9794 |
| 314.6 | 31.79 | 1 | A | 0.9794 |
| 310.8 | 32.17 | 1.88 | A | 0.9794 |
| 307.4 | 32.53 | 7.4 | A | 0.9794 |
| 300 | 33.33 | 1.13 | A | 0.9794 |
| 294.1 | 34.01 | 2 | A | 0.9794 |
| 290.3 | 34.45 | 0.14 | A | 0.9794 |
| 289.9 | 34.5 | 3.11 | A | 0.9794 |
| 278.2 | 35.95 | 0.366 | A | 0.9794 |
| 273.7 | 36.54 | 1.13 | A | 0.9794 |
| 262.3 | 38.12 | 0.18 | A | 0.9794 |
| 245.8 | 40.69 | 0.132 | A | 0.9794 |
| 240.9 | 41.51 | 0.085 | A | 0.9794 |
| 237.7 | 42.08 | 0.0125 | A | 0.9794 |
| 233.5 | 42.84 | 1.88 | A | 0.9794 |
| 230.2 | 43.43 | 0.102 | A | 0.9794 |
| 212.8 | 46.99 | 0.238 | A | 0.9794 |
| 207 | 48.31 | 2.48 | A | 0.9794 |
| 202.2 | 49.45 | 3.32 | A | 0.9794 |
| 200.6 | 49.84 | 2.43 | A | 0.9794 |
| 197.9 | 50.53 | 0.0417 | A | 0.9794 |
| 189.1 | 52.88 | 2.64 | A | 0.9794 |
| 184.8 | 54.12 | 6.1 | A | 0.9794 |
| 178.4 | 56.05 | 1.41 | A | 0.9794 |
| 172.2 | 58.06 | 0.935 | A | 0.9794 |
| 167.8 | 59.61 | 0.811 | A | 0.9794 |
| 132.1 | 75.69 | 0.271 | A | 0.9794 |
| 131.1 | 76.28 | 0.347 | A | 0.9794 |
| 129.8 | 77.03 | 2.88 | A | 0.9794 |
| 126 | 79.35 | 0.366 | A | 0.9794 |
| 120.4 | 83.04 | 0.5 | A | 0.9794 |
| 83.46 | 119.8 | 0.142 | A | 0.9794 |
| 81.21 | 123.1 | 0.0182 | A | 0.9794 |
| 71.85 | 139.2 | 0.0025 | A | 0.9794 |
| 70.74 | 141.4 | 0.0061 | A | 0.9794 |
| 58.1 | 172.1 | 0.0827 | A | 0.9794 |
| 44.38 | 225.3 | 0.0418 | A | 0.9794 |
| 28.07 | 356.2 | 4.4 | A | 0.9794 |
| 23.92 | 418 | 0.0791 | A | 0.9794 |
| 23.69 | 422.2 | 0.021 | A | 0.9794 |
Note(s):
You are kindly asked to consider the following references for citation when using the database: