Intramolecular transcyclometallation: the exchange of an aryl-Pt bond for an alkyl-Pt bond via an agostic intermediate.

Oxidation of a square-planar platinum complex leads to a five coordinate cationic intermediate that can be stabilized and trapped out via an agostic interaction with the alkyl chain of a ligand. Subsequent reaction of this species leads to the formation of an alkyl-Pt bond at the expense of an aryl-Pt bond: an intramolecular transcyclometallation.

Impact of school flu vaccine program on student absences.

Literature provides evidence that school attendance correlates with academic performance and student success. Influenza is a contributing factor to school absences. Primary prevention for influenza includes immunization. School-located influenza vaccine (SLIV) programs provide greater access for students to be immunized. A retrospective review of preexisting data from four academic years was conducted to examine the relationship between SLIV participation and absenteeism among students at eight public elementary schools in Effingham County, Georgia. Results identified differences in average frequency of absences between SLIV and non-SLIV years as well as between SLIV participants and nonparticipants for the 2 SLIV years. Implications for practice include the potential for increased herd immunity among students, which may also extend to other parties within the school community and at home, thus promoting overall wellness and future student success.

Cyclometallated platinum(II) complexes: oxidation to, and C-H activation by, platinum(IV).

A series of cyclometallated phenylpyridine platinum(II) complexes have been synthesised with a systematic variation in both the phenylpyridine and the ancillary ligand. Oxidation of one of the cyclometallated species leads to a number of isomeric platinum(IV) complexes, all of which eventually isomerize to a single compound. The route to these new compounds has been demonstrated to involve an initial slow oxidation followed by a rapid C-H activation to give doubly cyclometallated complexes. The solid state structures of a number of both the platinum(II) and the platinum(IV) species have been solved; many of the structures exhibited extended interactions that result in complex three dimensional packing.

Carbene or zwitterion? Competition in organoplatinum complexes.

The reaction of a known dimeric dicarbene complex of platinum with a number of ligands results in four new platinum complexes. The structure of the new complexes is described: one complex must exist as a neutral complex with no charge separation, and the other three are assigned a charge-separated (zwitterionic) structure, rather than a carbene form, on the basis of comparative 13C NMR shifts.