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Wichelhaus

H. Wichelhaus, Der Starke cker, Akademische VedagsgeseUschaft, Leipzig, Germany, 1913. [Pg.297]

The heats of neutralization of pyrophosphoric acid with sodium hydroxide show that the acid is probably tetrabasic, for H. Giran found that the first two displaceable hydrogen atoms have strongly marked acidic functions, and the other two have feeble acidic functions. The graphic formula (HO)2=PO.O.PO=(OH)2 is in agreement with the tetrabasicity of the acid, and with the work of W. A. Tilden and R. E. Barnett. 0. Favel also found pyrophosphoric acid behaved like a tetrabasic acid towards soluble blue indicator. The confident assumption that the phosphorus is quinquevalent precludes H. Wichelhaus formula (H0)2P.0.0.0.P(0H)2 but, before the formula (H0)2P0.0.P0(0H)2 can be definitely accepted, it must be shown that the formulae... [Pg.974]

Troost [12] obtained nitro- and dinitro-naphthalenes by successive nitration of naphthalene. Darmstadter and Wichelhaus [13] found that the dinitronaphthalene thus obtained was a mixture of the two isomers. [Pg.424]

See other pages where Wichelhaus is mentioned: [Pg.551]    [Pg.425]    [Pg.714]    [Pg.156]    [Pg.141]    [Pg.315]    [Pg.98]    [Pg.389]    [Pg.80]    [Pg.58]    [Pg.55]    [Pg.721]    [Pg.791]    [Pg.860]    [Pg.865]    [Pg.1003]    [Pg.1009]    [Pg.1011]    [Pg.1014]    [Pg.1019]    [Pg.1020]    [Pg.1021]    [Pg.1021]    [Pg.1022]    [Pg.1022]    [Pg.1029]    [Pg.1029]    [Pg.1042]    [Pg.1043]    [Pg.1045]    [Pg.1046]    [Pg.1046]    [Pg.1046]    [Pg.455]    [Pg.128]    [Pg.302]    [Pg.135]    [Pg.146]    [Pg.795]    [Pg.714]    [Pg.247]    [Pg.532]    [Pg.447]    [Pg.621]    [Pg.164]    [Pg.206]    [Pg.18]   
See also in sourсe #XX -- [ Pg.11 ]

See also in sourсe #XX -- [ Pg.59 ]



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Wichelhaus, Hermann

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