82 



J. BOOTH, E. BOYLAND 



VOL. 12 (1953) 



TABLE III 



PROPERTIES OF MOLECULAR COMPOUNDS FORMED BY COMBINATION OF 

 DIBENZCARBAZOLES AND DIBENZACRIDINES WITH PURINES 



Polycyclic compound 



Purine 



M.P. and 

 description 



Analysis CI g) DBC 



C H N orBDA 



I mol. 3:4-5:6 DBC 



I mol. caffeine 



CH, 



158° C28H23O2N5 requires 72.9 5.0 15.2 57.9 



plates Found 72.7 5.0 15.2 57.3 



O I 

 CH3^^A^/N 



I II 



1 

 CH, 



CH 



I mol. 1 :2-5 :6 DBC i mol. caffeine 



197° C2SH23O2N5 requires 72.9 5.0 15.2 57.9 

 small prisms Found 72.4 5.0 14.8 57.6 



I mol. 1 :2-7 :8 DBC 2 mols. caffeine 



H 



Softens 96° CggHgjO^Ng requires 65.9 5.1 19.2 40. 8 

 M.P. 170'^ Found 66.2 5.4 18.9 40.5 



small prisms 



I mol. 3 :4-5 :6 DBC i mol. TMUA 



CH, 

 O I ' 



236° C29H25O3N5 requires 70.9 5.1 14.2 54.4 



rect. plates Found 70.6 4.9 14.0 54.2 



c=o 



I I 



CHg CHg 



I mol. 3 :4-6:7 DBA i mol. TMUA 



185° C30H25O3N5 requires 71.6 5.0 14.0 55.5 



needles Found 71.9 5.4 14.2 56.6 



^. 



.i^ 



I mol. 1 :2-8:9 DBA i mol. TMUA 



198° C30H25O3N5 requires 71.6 5.0 14.0 55.5 

 plates Found 71.6 5.1 14.3 54.3 



DBC = Dibenzcarbazole; DBA = Dibenzacridine; TMUA = Tetramethyluric acid. 



sorption of the two components of the molecular compounds, (examples are given in 

 Figs. 6 and 7). 



Similar results have been found in the case of molecular compounds formed 

 between hydrocarbons and trinitrobenzene (Jones and Neuworth^), hydrocarbons and 

 deoxycholic acid (Fieser and Newman'^) and naphthalene and picric acid (Hunter, 

 QuREisHY and Samuel^). 



References p. 8j. 



