Novel tetraphenyldithiolene complexes, asymmetrically substituted benzoins, and optical recording materials containing the novel complexes

US4806664A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolfgang Schrott · Cologne, DE
• Peter Neumann · Wiesloch, DE
• Bernhard Albert · Monsheim, DE
• Michael Thomas · Weisenheim am Berg, DE
• Helmut Barzynski · Bad Dürkheim, DE
• Klaus D. Schomann · Stockach, DE
• Harald Kuppelmaier · Heidelberg, DE

Key dates

• Filing date: Jun 8, 1987
• Grant date: Feb 21, 1989
• Expiry date: Jun 8, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/146
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Tetraphenyldithiolene complexes of the formula ##STR1## and novel asymmetrically substituted benzoins of the formula ##STR2## where X.sup.1, X.sup.2 and X have the meanings stated in the description and Me is nickel, palladium or platinum. The complexes have very high absorption in the range from 800 to 950 nm and are readily soluble in the plastics used for the production of optical recording materials. PA1 The recording materials produced using these complexes have a very high signal/noise ratio.