Adamantylidenecarbene: Photochemical Generation, Trapping, and Theoretical Studies.

Photolysis of 1-(2-adamantylidene)-1a,9b-dihydro-1-cyclopropa[]phenanthrene in benzene (or benzene-) at ambient temperature produces adamantylidenecarbene. The carbene undergoes dimerization to a cumulene and may also be trapped in a stereospecific fashion by - and -4-methyl-2-pentene. No products attributable to 4-homoadamantyne, resulting from ring expansion of the carbene, could be detected.

Engaging patients, clinicians and health funders in weight management: the Counterweight Programme.

Background: The Counterweight Programme provides an evidence based and effective approach for weight management in routine primary care. Uptake of the programme has been variable for practices and patients. Aim.