Unusual temperature dependencies in the 1H NMR spectra of aminated fullerenes, previously attributed to 'globe-trotting' hydrogen, are in fact due to temperature and dilution dependent hydrogen bonding interactions with water.Soon after c 6 0 became available in macroscopic quantities,l addition of R(R')N and H elements across a double bond of several groups worked to functionalize this novel form of C ~O , as one might expect upon the collapse of a [C,]*carbon. Among the more interesting finds, Wudl et al.[R(R')NH]*+ radical ion pair followed by (or subsequent to) discovered2 that C60 reacts readily and repeatedly with proton transfer.3 Wudl etal. also reported2 formation of a primary and secondary amines yielding aminated fullerene morpholine adduct of c60, 1, to which they assigned the derivatives. Suggesting an electron transfer mechanism, it was structure C60H6[N(CH2CH*)20]6,2b,c and claimed2b that the reported2 that each amination reaction is characterized by the methine hydrogens readily 'globe-trot' about the aminated
Pupae of the nonbiting midge Chaoborus are reported from the middle Eocene (Claibornian) Tallahatta Formation in Benton County, Mississippi. These pupae are placed within the genus Chaoborus because the shape of the respiratory organs, length of the abdomen, and shape of the anal paddles closely resemble other species of this extant genus. This occurrence represents the oldest record of Chaoborus pupae and the first record of fossil Chaoborus from North America. The flora and fauna found associated with the fossil pupae along with the known habitats of extant Chaoborus pupae indicate a lentic environment. This interpretation corresponds to the depositional environment of similar Eocene-aged clay deposits in western Tennessee.
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