Cycloids containing oxygen. 73-" 



1912 



CYCLOIDS WITH EIGHT OXYGEX 



ATOMS. 



CYCLOID C; H Oj 



Hexaoxydiphenylmetliylolide 



C«H(OH),<Q-^^ >C'«H(QH), 



and its acetyl derivative. 



Perkin, A. G. London, J. Cham. Soc, 

 89, 1900, {25l~2(il); [abstract] London, 

 Proc. Chem. Soc, 22, 1906, (41-12). 



CYCLOID C.oHuOi 



Hexaoxydiphenylplithalide 



Hexametiiyl etiiei; 





-O- 



Perkin, \V. H. jun. and Weizmann, C. 

 London, J. Chem. Soc, 89, 1900, ^1049- 

 1665j. 



CYCLOIDS WITH TEN AND MORE 

 OXYGEN ATOMS. 

 CYCLOID CjHhOio 



Trioxyxanthylbenzene 

 tricarboxylic acid 



'^<<Si OHj>^vOH).C6H2(C02H)3 



SUberrad, 0. [3:6: 9-Trihydroxy- 

 xantliyl benzene-2 : 4 : 5-tricarboxylic 

 acid, 3:6: 9-triliydroxyxauthyl-beuzene- 

 2-carboxylactone-4 : .5-di.carboxylic acid 

 (diresorciuolpyromellitein), aud their 

 salts and 2:4:5:7 tetrabromo- and 

 -tetraiodo-derivates.] London, J. Chem. 

 Soc, 89, 190f;, (1787-1811); [abstract] 

 London, Proc Chem. Soc, 22, 1906, (251- 

 252). 



CYCLOID C36H22O15 



c 



>(C0,H),[.C(0H)<gBH3W>0]^ 



SUberrad, 0. [3 : 3' : 6 : 6' : 9 : 9'- 

 Hexahydroxy-??i- and -^J-dixanthylben- 

 zene-2 : 4 : 5 : 0-tetracarboxyIic acids 

 (tetraresorciuol-melliteins), and their 

 salts and 2 : 2' : 4 : 4' : : 5' : 7 : 7'-octa- 

 bromo-derivates.] London, J. Chem. 

 Soc, 89, 1900, (1787-1811); [abstract] 

 London, Proc Chem. Soc, 22, 1906, 

 (251-252). 



CYCLOID C43H30O18 



C,(C0,H)3[.C,0H,<^bH3(0H)^0]^ 



SUberrad, 0. [3 : 3' : 3" : 6 : 6' : 6" : 

 9:9': 9"-Nonaliydroxy-s^;?i-trixanthyl- 

 D-6534) 



benzene-2 : 4 : 6-tricarI)oxylic acid (hexa- 

 resorcinol-melliteia), and its salts and 

 2 : 2' : 4 : 4' : 5 : 5' : 7 : 7' - dodecabromo- 

 and -dodecaiodo-derivates.] I.e. 



1912 CYCLOIDS WITH TWO 

 ATOMS OF OXYUEN IN THE 

 RING. 



GENERAL. 



Guttmann, L. Piperonaldazin. Diss. 

 Heidelberg, 1903. 



NeU, A. A. DInaphtvleudioxvd. 

 Bei-liii, Ber. U. chem. Ges.', 39, 1900, 

 (1059-1000;. 



Scbmittmann, J. S^-mmetrisclies 

 Dipiperonylhydrazin und Piperonyl- 

 hydrazin. Diss. Heidelberg, 1904. 



UUmann, F. und Stein, A. Dipheny- 

 lendioxvd. Berlin, Ber. D. chem. Ges., 

 39, 1900, ie22-625). 



CYCLOIDS WITH TWO OXYGEN 



ATOMS. 



CYCLOID C4Hi02 



Diethyleue dioxide 



Q J'H2.CH2 . 

 ^^CH2.CH2-^^ 



OXOXIL'M DERIVATIVES. 



Favorskij, A. St. Peterburg, Zurn. 

 russ. iiz.-chim. Obsc., 38, 1900, (741- 

 75.5). 



CYCLOID CjH 0. 



Methylene-dioxystyrene 



CH2<Jj>C6H3.CH : CH2 



(P iixrontjletliijlene). 



Mameli, E. Gazz. chim. ital., Roma, 

 34, i, 1904, (358-374). 



CYCLOID C Hi O2 



Methylenedioxyplienylethane 



BROMO DERIVATIVE 



CH2<JJ>C6H3-CHBr.CH3 

 and the dibromo derivative. 

 Mameli, E. I.e. 



CYCLOIDS C.HiiOi 



Diniethylethylpyrone 

 .CEt.CMe ^ 



cf — o 



\CH=CMe/ 



Bain, A. W. [ and its 



hydrochloride and platiuichloride.] 

 3 B 2 



