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As"you may vell gather from aur telephone couversations and my
silence during the past two months, the reason you have not heard from me
Booner. regarding the material (I) which was submitted to. up pas been that
our recent work has not yielded positive results. You may/remember. that
at the time I submitted my first report (August, 1952) we ndd determined
that this material showed spectral characteristiçe oonsisteht with, the
prasence.of CEN, C CE,or SiH roups (absorption mround 200 cm) in
addition to tha possible presence of carbopyl, anide, and rethylene roups It was" our intention to attempt to detepmine more abaut the
constituent molecular groupinge in the Crystailine material by deuteration
experiments and you kindly.supplied us wth some COD. We attempted to couterate some rragmentary crystale of the substance (I): and on doing pd obtained apthe substance (Ii). We did not
vork with the large cryatpls of (I), bht rather with some fragments vhich
mayor maynot heve been identical vith the large crystals vhose spectral properties have beed deterined and réported.In any case,the substance (I1): shoved the presence or deuterix,as evidenced by absorption at.2630
and:251s cmland ahoved no absorption in the region where there previously bad been phsorption arpund 2200 cm-l. Furtherwoze, the substance (I) shoved. no sharp meltixg/point on heatingto 33oo C. Thirdly, on removing the deuteriu by boliing vith vater, .the original material was notobtained since no, absorption bande appeared: in the substance (Il) around 2200 cm Fromthe above experiments it may be concluded that either (a)substance (I) is a mixture'of.two materials and we vare, not using.the, samegubstance vith vhich ve.obtained our.original opectral data, or
(b) gubatance (I) ie decomposed.by. treating with CHOD and retreatingtig
vith vater to yield a material non-identical vith the original compound(

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To verify or disprove either of these hypotheses it vill be necessary to take one of the larger original crystals and attempt to deuterate that. "In vlew of our lack of success in learning anything definite to date, I have hesitated to do this. If, however, you have no other use for the material, ve shall attempt this procedure. As indicated in my report of July 29, 1952, it may be possible thus to learn more about 'the molecular groupinge present in the. original.crystalline waterial (I). I await your,advice on this matter.rta.

May 29, 1953