Abstract: The present invention relates to a method of forming diazoalkanes. One aspect of the present invention provides a method for the production of a N-alkyl-N-nitroso compound from a starting material, comprising the use of a tribasic acid to acidify an amine. A second aspect of the present invention provides a method for the production of a diazoalkane, comprising reacting a N-alkyl-N-nitroso compound with a base and a phase transfer catalyst, wherein no organic solvent is used.

Abstract: The invention concerns a camera head mount comprising: a strap for encircling the head and means for securing the strap around the head to prevent or hinder slippage of the camera head mount once secured in its mounted position; a camera holding pocket provided on the strap and situated such that when the camera head mount is secured in its mounted position the camera holding pocket is adapted to hold a camera in a forward-facing position against the forehead of the user, the lens of a mounted camera pointing forwards and through a lens aperture provided in the camera holding pocket at the front thereof, the camera holding pocket otherwise being adapted substantially to enclose a camera therein in a mounted and supported position on the forehead of the user.