102 IOWA ACADEMY OF SCIENCES. 



lege, and as this paper is to be made the basis for future 

 work a bibliography of diphenyl ethers is here appended. 



BIBLIOGRAPHY. 



(1) Ann. 90, 209. — List and Limpricht obtained diphenyl 

 ether as one of the products of the destructive distillation 

 of copper benzoate. 



(2) Ann. 125, 328.— Rudolph Fittig obtained diphenyl 

 from the above mentioned distillate. 



(8) Ann. 138, 375.— C. Lesimple obtained a compound 

 by distilling phenyl phosphate with lime, which he called 

 phenyl ether. 



(4) Ann. 159, 191, and Ber. 3, Ul.—W. Hoffmeister pre- 

 pared phenyl ether by treating diazo-benzene sulphate 

 with phenole and made a thorough study of the com- 

 pound. 



(5) Ber. 23, 3709.— Hirsch varied Hoffmeister's method 

 and greatly increased the yield. 



(6) Ber. 6, 564. — Maikopar made a dinitro derivative by 

 acting on dinitro chlor benzene with an alcoholic solution 

 of potassium hydroxide and phenol. 



(7) Ber. 13, 887. — Willgerodt prepared a tetra nitro- 

 derivative by heating dinitro-potassium phenolate with 

 dinitro-chlor benzene in a sealed tube. 



(8) Ber. 14, 187. — Merz and Weith prepared pheny 

 ether by heating phenol with zinc chloride, and also 

 aluminum chloride (see also correspondence, Ber. 12, 1925.) 



(9) Ber. 15, 1123. — Niederhausern prepared methylene 

 diphenyl-oxideby distilling sodium phenolate with sodium 

 meta-phosphate. 



(10.) Ber. 17, 1764.— Willgerodt and Huetlin prepared 

 derivatives by acting on potassium phenolates with dinitro- 

 chlor benzene and pikryl chloride. 



(11) Ber. 17, 2638. — Bausch prepared a dimethyl deriva- 

 tive by heating para-cresol with zinc chloride. 



(12) Ber. 29, 1446. — Haeussermann and Teichman pre- 

 pared various derivatives by acting on halogen-nitro ben- 

 zene derivatives with potassium or sodium phenolates. 



