Difluoroborane Oxide (O(BF2)2) B2F4O1(g) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 51.315 267.752 399.768 -13.202 -1894.168 -1878.142 981.041 200 66.790 307.999 344.533 -7.307 -1896.253 -1861.276 486.115 250 74.652 323.753 338.831 -3.770 -1897.191 -1852.422 387.042 298.15 81.853 337.523 337.523 0. -1898.072 -1843.720 323.012 300 82.121 338.031 337.525 0.152 -1898.105 -1843.382 320.961 350 89.101 351.220 338.551 4.434 -1898.993 -1834.191 273.738 400 95.547 363.545 340.913 9.053 -1899.853 -1824.875 238.304 450 101.427 375.144 344.078 13.980 -1900.674 -1815.453 210.732 500 106.733 386.110 347.738 19.186 -1901.443 -1805.942 188.665 600 115.686 406.393 355.852 30.325 -1902.793 -1786.711 155.547 700 122.698 424.775 364.406 42.258 -1903.900 -1767.273 131.876 800 128.153 441.531 373.015 54.812 -1904.799 -1747.692 114.113 900 132.412 456.881 381.493 67.849 -1905.537 -1728.007 100.291 1000 135.763 471.012 389.748 81.265 -1906.157 -1708.248 89.230 1100 138.428 484.082 397.737 94.979 -1906.696 -1688.430 80.177 1200 140.570 496.222 405.444 108.933 -1907.187 -1668.566 72.631 1300 142.311 507.544 412.868 123.080 -1907.653 -1648.662 66.244 1400 143.742 518.145 420.013 137.385 -1908.116 -1628.722 60.768 1500 144.929 528.104 426.890 151.820 -1908.591 -1608.749 56.022 1600 145.923 537.490 433.512 166.364 -1909.090 -1588.743 51.867 1700 146.763 546.362 439.892 180.999 -1909.624 -1568.706 48.200 1800 147.479 554.772 446.043 195.712 -1910.197 -1548.635 44.940 1900 148.093 562.762 451.977 210.492 -1910.815 -1528.532 42.022 2000 148.623 570.372 457.708 225.328 -1911.477 -1508.395 39.395 2100 149.084 577.635 463.247 240.214 -1912.183 -1488.224 37.018 2200 149.487 584.580 468.606 255.143 -1912.931 -1468.018 34.855 2300 149.841 591.233 473.794 270.110 -1913.718 -1447.777 32.880 2400 150.154 597.617 478.821 285.110 -2015.058 -1425.363 31.022 2500 150.432 603.752 483.696 300.139 -2016.065 -1400.772 29.268 2600 150.679 609.657 488.428 315.195 -2017.031 -1376.141 27.647 2700 150.901 615.348 493.024 330.274 -2017.954 -1351.474 26.146 2800 151.100 620.840 497.492 345.375 -2018.827 -1326.773 24.751 2900 151.280 626.145 501.837 360.494 -2019.648 -1302.042 23.452 3000 151.442 631.277 506.067 375.630 -2020.413 -1277.284 22.239 3100 151.590 636.245 510.186 390.782 -2021.118 -1252.501 21.105 3200 151.724 641.060 514.201 405.948 -2021.762 -1227.697 20.040 3300 151.847 645.730 518.116 421.126 -2022.340 -1202.873 19.040 3400 151.959 650.265 521.937 436.317 -2022.852 -1178.033 18.098 3500 152.062 654.672 525.667 451.518 -2023.296 -1153.179 17.210 3600 152.156 658.957 529.310 466.729 -2023.672 -1128.313 16.371 3700 152.244 663.127 532.870 481.949 -2023.978 -1103.437 15.578 3800 152.324 667.188 536.352 497.177 -2024.215 -1078.555 14.826 3900 152.399 671.146 539.758 512.413 -2024.383 -1053.666 14.112 4000 152.468 675.005 543.091 527.657 -2024.482 -1028.774 13.434 4100 152.532 678.770 546.354 542.907 -2024.513 -1003.882 12.790 4200 152.592 682.447 549.551 558.163 -2984.176 -964.940 12.001 4300 152.647 686.038 552.683 573.425 -2981.899 -916.890 11.138 4400 152.699 689.548 555.754 588.692 -2979.561 -868.893 10.315 4500 152.748 692.980 558.766 603.965 -2977.164 -820.950 9.529 4600 152.793 696.338 561.720 619.242 -2974.710 -773.062 8.778 4700 152.836 699.624 564.619 634.523 -2972.202 -725.227 8.060 4800 152.876 702.842 567.466 649.809 -2969.640 -677.445 7.372 4900 152.914 705.995 570.261 665.098 -2967.029 -629.718 6.713 5000 152.949 709.085 573.006 680.392 -2964.371 -582.045 6.081 5100 152.983 712.114 575.704 695.688 -2961.667 -534.425 5.474 5200 153.014 715.085 578.356 710.988 -2958.922 -486.859 4.891 5300 153.044 718.000 580.964 726.291 -2956.136 -439.345 4.330 5400 153.072 720.861 583.528 741.597 -2953.314 -391.886 3.791 5500 153.099 723.670 586.050 756.905 -2950.458 -344.479 3.272 5600 153.124 726.428 588.533 772.216 -2947.571 -297.122 2.771 5700 153.148 729.139 590.976 787.530 -2944.655 -249.820 2.289 5800 153.171 731.803 593.381 802.846 -2941.713 -202.567 1.824 5900 153.192 734.421 595.749 818.164 -2938.749 -155.366 1.376 6000 153.213 736.996 598.082 833.484 -2935.764 -108.215 0.942