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J. F. I., ()N I)IACLTYL ANI) SOME ov ITS DERIVATIVES. * BY HARRY F. KEt LER.
[.'t ]~aISer read before the Chemical Section at the Slated Meetin G f'ebruary ~9, zgg9.] \Vith a view to a synthetic formation of citric acid, Fittig and Daimler + subjected ethyl oxalate to the action of ethyl monochloracetate and zinc. The reaction did not take place in the desired manner, but they found among the products the ether of a dibasic, diketonie acid, which they termed ketipic (diketoadipic) acid. From the reactions of this ether it appeared highly probable that the structure of the acid must be expressed by one of the two formulae :
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## Abstract The resolution of η^5^(2‐formyl‐3,4‐dimethylphospholyl)(triphenylphosphine)‐manganesedicarbonyl **1** has been carried out by chromatography of the acetals derived from (__S__,__S__)‐1,2‐diphenylethane‐1,2‐diol. The enantiopure 2‐diphenylphosphinomethyl **4** and diphenylmethylimino **5
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