(2) This melting point for an oxime of 9-anthraldehyde has not been reported again in the literature. Hinkel, Ayling and Beynon report that after crystallizing 9-anthraldehyde. mp 105', in the light it melted over a range up to 135O. It is not likely that they used this material containing the photodimer to prepare their oxime, mp 187O. The photodimer of 9- anthraldehyde melts at 187'also according to FD Greene, SL Misrock and JR Wolfe, Jr., ...
