Abstract: The device (V) serves the optical coupling of an arriving light beam (L) from any optical component, with a further-transmitting light-guiding fiber (F). It contains in each case an input-side and output-side coupling body (1,2) with in each case a centric lead-through (13, 22) for leading through the light (L), wherein in the device (V) there is arranged at least one lens (40) or a lens system. Between the input-side (1) and the output-side coupling body (2) there is arranged an intermediate coupling body (3) with a centric lead-through (34), which in one of the input-side or output-side coupling bodies (1,2) is displaceably and lockably held in a plane, whilst the other input-side or output-side coupling bodies (1,2) in the intermediate coupling body (3) is mounted in an elastically (25) pivotally movable and axially displaceable manner. The device (V) permits a separate angular adjustment or parallel displacement of the input-side and output-side coupling bodies (1,2) relative to one another.

Abstract: Process for preparing aminodihalophosphines, diaminohalophosphines, triaminophosphines, phosphorous ester diamides, aminophosphines, diaminophosphines, phosphorous ester amide halides and aminophosphine halides with elimination of an acid in the presence of an auxiliary base, wherein the auxiliary base b) and the acid form a salt which is liquid at temperatures at which the desired product is not significantly decomposed during the process of separating off the liquid salt and c) the salt of the auxiliary base forms two immiscible liquid phases with the desired product or the solution of the desired product in a suitable solvent.

Abstract: A process for removing acids from reaction mixtures using an auxiliary base, in which the auxiliary base