2.6 - di - tert butyl - 4 - 5 - (2,6 di tert butyl 4 in thiopyran yliden) - penta - 1.3 - dienyl thiopyryliumsalze, methods for their manufacture and photoleitende containing mass

摘要

2,6-Di-tert-butyl-4- 5-(2,6-di-tert-butyl-4H-thiopyran-4- ylidene) penta- 1,3-dienyl!thiopyrylium salts, which are novel, colorless, transparent, having an adsorption in the far infrared to near infrared region and capable of imparting high sensitivity to photoconductive substance; process for producing the salts; and a photoconductive composition containing the salt.