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HYDANTOIN AND ITS DERIVATIVES

Liteiatuie values vary, depending on the rate of heating. [Pg.249]

Kirk-Othmer Encyclopedia of Chemical Technology (4th Edition) [Pg.249]

Solvent variation can gready affect the acidity of hydantoins. Although two different standard states are employed for the piC scale and therefore care must be exercised when comparing absolute acidity constants measured in water and other solvents like dimethyl sulfoxide (DMSO), the huge difference in piC values, eg, 9.0 in water and 15.0 in DMSO (12) in the case of hydantoin itself, indicates that water provides a better stabilization for the hydantoin anion and hence an increased acidity when compared to DMSO. [Pg.250]

2-Thiohydantoin [503-87-7] (pi C 8.5) is a slightly stronger acid than hydantoin (pi C 9.0). 4-Thiohydantoins appear to be weaker acids (4). [Pg.250]

Hydantoin derivatives show weak absorption in the uv-visible region, unless a part of the molecule other than the imidazohdinedione ring behaves as a chromophore (13) however, piC values have been determined by spectrophotometry in favorable cases (14). Absorption of uvby thiohydantoins is more intense, and the two bands observed have been attributed to n — tt and n — tr transitions of the thiocarbonyl group (15,16). Several piC values of thiohydantoins have been determined by uv-visible spectrophotometry (16). [Pg.250]

ANTIBACTERIAL AGENTSSYNTHETIC - NITROFURANS] (Vol 2) ofhydantoins [HYDANTOIN AND ITS DERIVATIVES] (Vol 13)... [Pg.62]

Antitumor activity - [ANTIBIOTICS - ANSAMACROLIDES] (Vol2) - [ANTIBIOTICS - ANSAMACROLIDES] (Vol2) -of enzymes [ENZYME APPLICATIONS - THERAPEUTIC] (Vol9) -ofhydantoins [HYDANTOIN AND ITS DERIVATIVES] (Vol 13)... [Pg.65]

See other pages where HYDANTOIN AND ITS DERIVATIVES is mentioned: [Pg.59]    [Pg.65]    [Pg.368]    [Pg.471]    [Pg.485]    [Pg.788]    [Pg.912]    [Pg.249]    [Pg.249]    [Pg.250]    [Pg.251]    [Pg.252]    [Pg.253]    [Pg.254]    [Pg.255]    [Pg.256]    [Pg.257]    [Pg.258]    [Pg.259]    [Pg.260]    [Pg.29]    [Pg.41]    [Pg.59]    [Pg.60]    [Pg.61]    [Pg.81]    [Pg.98]    [Pg.102]    [Pg.112]    [Pg.112]    [Pg.131]    [Pg.131]    [Pg.132]    [Pg.135]    [Pg.240]    [Pg.268]    [Pg.278]    [Pg.301]    [Pg.303]    [Pg.314]    [Pg.320]    [Pg.325]    [Pg.325]    [Pg.332]    [Pg.338]    [Pg.339]    [Pg.347]    [Pg.368]   


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And its derivatives

Hydantoin

Hydantoin and derivatives

Hydantoin and derivs

Hydantoin derivatives

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