5, 6, 7, 8-Tetrahydro-2, 2, 4, 4-tetramethyl-l, 3 (2H, 4H)-naphthalenedione (6c).-A sample of 14 (14 g, 0.059 mole) waa allowed to stand at room temperature for approximately 5 weeks. During this time a new liquid phase appeared. The mixture waa filtered to give 6.5 g of a solid which had an infrared spectrum identical with that of 14. The infrared spectrum of the filtrate (7 g) was identical with that of 6c. The presence of water in this filtrate was indicated ...
