*croconic acid; Colmenero et al.; refrective index; theroretical data* data provided by F. Colmenero; for details see paper. nm n k 200.3780286 2.2669437 0.2676822 200.9384141 2.2301042 0.2161540 201.5019428 2.1898519 0.1694030 202.0686083 2.1465823 0.1288320 202.6385031 2.1014509 0.0955980 203.2116215 2.0560639 0.0700129 203.7879574 2.0120162 0.0514114 204.3676055 1.9704896 0.0384214 204.9505266 1.9320648 0.0294333 205.5368166 1.8967624 0.0230124 206.1264706 1.8642334 0.0181455 206.7194831 1.8339931 0.0142773 207.3159522 1.8056073 0.0112126 207.9158734 1.7787923 0.0089451 208.5192417 1.7534207 0.0074942 209.1261573 1.7294647 0.0067937 209.7365808 1.7069067 0.0066644 210.3506139 1.6856729 0.0068664 210.9682529 1.6656133 0.0071886 211.5894936 1.6465347 0.0075170 212.2144401 1.6282615 0.0078479 212.8430893 1.6106800 0.0082412 213.4754373 1.5937473 0.0087435 214.1115908 1.5774568 0.0093315 214.7515099 1.5617839 0.0099044 215.3953029 1.5466453 0.0103330 216.0429676 1.5318959 0.0105317 216.6945010 1.5173683 0.0105123 217.3500142 1.5029254 0.0103857 218.0095053 1.4885028 0.0103188 218.6729721 1.4741186 0.0104696 219.3405283 1.4598516 0.0109347 220.0121337 1.4458027 0.0117291 220.6879038 1.4320596 0.0127942 221.3678380 1.4186711 0.0140279 222.0519351 1.4056392 0.0153158 222.7403135 1.3929272 0.0165576 223.4329330 1.3804700 0.0176784 224.1299138 1.3681853 0.0186291 224.8312566 1.3559790 0.0193897 225.5369615 1.3437549 0.0199813 226.2471517 1.3314346 0.0204719 226.9618286 1.3189790 0.0209643 227.6809932 1.3063961 0.0215559 228.4047719 1.2937269 0.0223022 229.1331245 1.2810123 0.0232086 229.8661799 1.2682747 0.0242649 230.6039408 1.2555292 0.0254857 231.3464096 1.2428148 0.0269179 232.0937182 1.2302207 0.0286006 232.8458704 1.2178757 0.0304998 233.6028696 1.2059043 0.0324665 234.3648512 1.1943652 0.0342387 235.1317754 1.1832052 0.0354892 235.9037803 1.1722308 0.0358888 236.6808714 1.1611103 0.0351861 237.4630535 1.1494119 0.0332975 238.2504684 1.1366873 0.0303821 239.0431228 1.1225890 0.0268540 239.8410226 1.1069725 0.0232851 240.6443137 1.0899323 0.0202329 241.4529566 1.0717466 0.0180766 242.2670998 1.0527697 0.0169429 243.0867519 1.0333170 0.0167320 243.9119211 1.0135945 0.0171982 244.7427598 0.9936625 0.0180338 245.5792780 0.9734357 0.0189478 246.4214852 0.9527108 0.0197437 247.2695383 0.9312229 0.0203727 248.1233990 0.9087215 0.0209459 248.9832271 0.8850311 0.0216806 249.8490351 0.8600813 0.0228223 250.7208349 0.8338954 0.0245666 251.5987911 0.8065530 0.0269957 252.4829175 0.7781244 0.0300267 253.3732278 0.7485634 0.0333793 254.2698913 0.7175733 0.0366255 255.1728713 0.6845054 0.0393781 256.0823404 0.6483752 0.0415855 256.9983157 0.6080312 0.0437831 257.9208135 0.5623905 0.0471496 258.8500118 0.5105685 0.0533405 259.7859295 0.4517697 0.0642949 260.7285848 0.3849107 0.0825061 261.6781614 0.3085250 0.1127461 262.6346243 0.2252143 0.1661640 263.5981608 0.1568037 0.2494903 264.5687933 0.1170776 0.3389206 265.5465436 0.0932951 0.4212814 266.5316048 0.0774409 0.4975792 267.5240014 0.0668280 0.5697763 268.5237577 0.0603958 0.6389512 269.5310729 0.0573898 0.7056568 270.5459151 0.0570977 0.7703292 271.5684878 0.0589889 0.8334613 272.5988197 0.0628928 0.8955560 273.6369393 0.0689951 0.9569526 274.6830567 0.0775689 1.0177205 275.7372035 0.0886511 1.0777421 276.7994106 0.1019329 1.1369588 277.8698953 0.1170069 1.1955876 278.9486294 0.1338573 1.2541044 280.0358350 0.1532092 1.3129174 281.1315486 0.1763438 1.3719166 282.2358061 0.2044206 1.4302398 283.3488374 0.2376758 1.4864642 284.4706822 0.2750409 1.5391694 285.6013798 0.3144172 1.5875658 286.7411681 0.3534225 1.6319095 287.8900234 0.3903438 1.6735478 289.0481892 0.4249264 1.7145333 290.2157110 0.4586878 1.7568735 291.3926343 0.4944858 1.8016798 292.5792111 0.5354887 1.8486403 293.7754912 0.5841761 1.8960788 294.9815238 0.6419320 1.9413863 296.1975702 0.7090737 1.9813398 297.4236129 0.7844480 2.0121460 298.6599196 0.8642536 2.0296710 299.9065472 0.9409562 2.0305136 301.1635523 1.0039426 2.0141077 302.4312125 1.0427865 1.9851322 303.7095895 1.0524152 1.9546334 304.9987448 1.0379557 1.9377719 306.2989665 1.0156865 1.9470683 307.6102452 1.0065409 1.9842517 308.9328764 1.0244744 2.0383277 310.2669305 1.0693219 2.0926322 311.6124779 1.1295602 2.1339509 312.9698257 1.1902203 2.1572020 314.3390501 1.2397894 2.1653936 315.7202274 1.2736031 2.1667540 317.1136768 1.2938288 2.1706921 318.5193991 1.3068034 2.1841063 319.9377222 1.3194311 2.2097175 321.3687330 1.3368493 2.2469602 322.8125184 1.3626397 2.2940444 324.2694200 1.4004548 2.3489687 325.7395315 1.4544709 2.4086965 327.2229473 1.5275317 2.4679330 328.7200230 1.6185720 2.5193764 330.2307721 1.7216140 2.5556812 331.7555606 1.8270420 2.5719099 333.2944953 1.9240547 2.5672739 334.8476836 2.0032688 2.5459334 336.4155070 2.0593015 2.5169935 337.9980812 2.0934371 2.4933790 339.5955223 2.1153730 2.4885757 341.2082286 2.1419277 2.5111016 342.8362304 2.1910342 2.5592366 344.4799377 2.2734831 2.6206384 346.1394822 2.3882753 2.6780909 347.8149964 2.5250020 2.7172893 349.5069090 2.6706834 2.7317169 351.2153622 2.8162464 2.7228688 352.9404995 2.9593928 2.6966013 354.6827694 3.1029906 2.6577287 356.4422234 3.2503918 2.6058911 358.2193239 3.4007769 2.5352033 360.0142332 3.5473596 2.4377026 361.8271149 3.6791461 2.3082564 363.6584534 3.7847645 2.1482333 365.5084244 3.8564111 1.9665848 367.3772048 3.8924839 1.7780017 369.2653028 3.8980941 1.5984973 371.1727974 3.8831616 1.4397659 373.1002135 3.8585334 1.3049817 375.0477513 3.8317035 1.1888741 377.0156130 3.8045748 1.0825340 379.0043500 3.7746953 0.9796748 381.0141793 3.7388482 0.8800142 383.0453198 3.6963026 0.7879855 385.0983516 3.6498036 0.7085021 387.1733885 3.6041582 0.6429754 389.2710307 3.5636046 0.5880262 391.3915262 3.5296107 0.5372020 393.5351254 3.5003432 0.4842608 395.7024606 3.4718254 0.4258067 397.8938006 3.4398259 0.3621619 400.1094172 3.4013926 0.2964843 402.3499773 3.3555026 0.2330828 404.6156403 3.3029200 0.1758875 406.9070976 3.2456190 0.1275336 409.2246571 3.1861065 0.0891227 411.5686308 3.1268493 0.0603932 413.9397492 3.0698703 0.0400919 416.3383467 3.0165183 0.0264141 418.7647624 2.9674148 0.0174497 421.2197693 2.9225693 0.0115582 423.7035861 2.8816093 0.0075716 426.2170159 2.8440280 0.0047967 428.7604432 2.8093576 0.0028715 431.3342583 2.7772325 0.0015942 433.9393126 2.7473758 0.0008097 436.5760247 2.7195586 0.0003730 439.2448196 2.6935718 0.0001550 441.9466015 2.6692171 0.0000579 444.6816668 2.6463129 0.0000195 447.4509572 2.6246986 0.0000057 450.2549557 2.6042387 0.0000015 453.0941534 2.5848182 0.0000004 455.9695526 2.5663412 0.0000000 458.8816802 2.5487262 0.0000000 461.8310724 2.5319028 0.0000000 464.8187978 2.5158096 0.0000000 467.8452553 2.5003934 0.0000000 470.9115608 2.4856058 0.0000000 474.0183252 2.4714041 0.0000000 477.1661710 2.4577504 0.0000000 480.3562906 2.4446098 0.0000000 483.5893527 2.4319511 0.0000000 486.8660391 2.4197456 0.0000000 490.1876264 2.4079674 0.0000000 493.5546508 2.3965928 0.0000000 496.9684494 2.3855993 0.0000000 500.4298019 2.3749674 0.0000000 503.9395038 2.3646780 0.0000000 507.4989909 2.3547142 0.0000000 511.1091194 2.3450597 0.0000000 514.7707638 2.3356997 0.0000000 518.4854686 2.3266207 0.0000000 522.2539554 2.3178095 0.0000000 526.0778471 2.3092540 0.0000000 529.9581482 2.3009433 0.0000000 533.8958862 2.2928663 0.0000000 537.8928126 2.2850138 0.0000000 541.9500352 2.2773759 0.0000000 546.0686881 2.2699443 0.0000000 550.2506655 2.2627105 0.0000000 554.4969433 2.2556671 0.0000000 558.8095196 2.2488061 0.0000000 563.1897035 2.2421213 0.0000000 567.6388374 2.2356057 0.0000000 572.1590904 2.2292535 0.0000000 576.7519131 2.2230585 0.0000000 581.4187947 2.2170151 0.0000000 586.1620951 2.2111185 0.0000000 590.9831436 2.2053632 0.0000000 595.8844401 2.1997445 0.0000000 600.8677139 2.1942582 0.0000000 605.9347429 2.1888997 0.0000000 611.0882590 2.1836650 0.0000000 616.3301890 2.1785500 0.0000000 621.6625162 2.1735512 0.0000000 627.0882336 2.1686650 0.0000000 632.6091708 2.1638879 0.0000000 638.2285136 2.1592168 0.0000000 643.9485821 2.1546482 0.0000000 649.7717686 2.1501795 0.0000000 655.7015804 2.1458080 0.0000000 661.7406197 2.1415305 0.0000000 667.8915730 2.1373446 0.0000000 674.1583133 2.1332478 0.0000000 680.5433939 2.1292377 0.0000000 687.0509604 2.1253117 0.0000000 693.6841831 2.1214681 0.0000000 700.4463414 2.1177047 0.0000000 707.3420386 2.1140189 0.0000000 714.3748580 2.1104092 0.0000000 721.5485110 2.1068738 0.0000000 728.8681276 2.1034106 0.0000000 736.3373338 2.1000179 0.0000000 743.9616555 2.0966941 0.0000000 751.7455195 2.0934374 0.0000000