Difructose anhydride I, one of three isomeric difructose anhydrides derived from inulin by hydrolysis with aqueous acids, has been shown by Haworth and Streight to yield upon methylation and hydrolysis, two molecules of 3,4,6~tri methylfructose. Difructose anhydride III, upon methylation and hydrolysis, failed to yield the characteristic osazone of 3,4,6-trimethylfructose, but it was shown by oxidation to trimethylarabonolactone that this methylated fructose was one constituent of a mixture of two trimethylfructoses. Both trimethylfructoses in the mixture were shown to be furanose derivatives.Tritylation of difructose anhydride III · yi~lded a crystalline tritrityl derivative which was methylated to form tritrityltrimethyldifructose anhydride III. The latter was detritylated and hydrolyzed, and the products of hydrolysis were separated by fractional distillation of their methyl fructosides. The lower-boiling fraction was identified as the fructoside of 3,4-dimethylfructose, [<>]1,"=-60.66, by oxidation to a 3,4-dimethyl dibasic lactol acid. The higher-boiling fraction was found 'to be the fructoside of 4-methylfructose, as indicated by the melting point of its glucosazone (156° C), identical with that of the osazone prepared from 4-methylglucose. The trityl groups were shown to be substituents of the three primary alcohol groups. The sugar was thus constituted of two furanoid fructose residues, with two oxygen . bridges connecting carbon atoms 1 and 2 of the one residue with 2' and 3' of the other.Crystalline ditrityltetra-acetyldifructose anhydride I yielded, upon methylation and hydrolysis, 3,4-dimethylfructose, and by substitution of the trityl by methyl groups, 6-methylfructose.

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The polysaccharide, inulin, has previously been shown to

The addition of alkylchloroaluminium deri-BESTIAN and CLAUSS~ used the soluble catalyst, MeTiC1,sMevatives to ZrR, (R = ally1 or benzyl) produces active AlC1, a t low temperatures to oligomerise ethylene to precatalysts for the preparation of C4-C2, a-olefins from dominantly 2-ethyl-a-olefins. More recently, Langer2 has ethylene. used TiC14.Et,A1C1,-, and obtained high proportions of linear cc-olefins. Similar results have been patented3 for

Zirconium hydrocarbyl catalysts react with nylon and poly(ethylene terephthalate) (PET) fibers to produce a supported species which may be used to polymerize a sheath of polyethylene around the fiber. Very high catalyst activities have been achieved over very short reaction periods on PET spinning threadlines. It is also possible to use these reagents to produce strongly adhered oxide and sulfide surface coatings. Infrared evidence is given for a mechanism in the case of reaction between catalyst and PET.