Low-cost conversion of a coaxial nozzle arrangement into a stationary low-temperature attachment

Abstract

A stationary nozzle accessory designed for the Siemens/Nicolet LTII low-temperature device with standard q~-coaxial nozzle arrangement is described. The attachment is easy to assemble and its compatibility allows interchanging between both systems in less than l h, if required. Implementation of the stationary nozzle reduces the consumption of liquid nitrogen by more than 40% and extends the temperature range available for data collection by 60 K in the lower temperature range. Details of construction are presented, and a comparison with the tpcoaxial nozzle is discussed.

Macromolecular Cryocrystallography: Cooling, Mounting, Storage and Transportation of Crystals

“…More complex designs (e.g. Kottke et al, 1996) are not necessary. A properly designed low-temperature machine should be capable of producing temperatures below 100 K with a liquid-N 2 consumption well below 1 l h À1 .…”

Metal-Directed Formation of Tetra-, Hexa-, Octa-, and Nonanuclear Complexes of Magnesium, Calcium, Manganese, Copper, and Cadmium

“…The cadmium complexes 2 were obtained as yellow microcrystals, the manganese complexes 3 as orange ones. The 1 H and 13 C NMR spectra of the diamagnetic cadmium compounds 2 (S 4 symmetry, e.g., 2c: nine 1 H and twenty 13 C NMR signals) [12] indicate that in each case four ligands in these complexes are identical and the two halves of each ligand have to be in HOPr with four coordinated propanol molecules ( Figure 1). Each of the eight manganese ions form the corners of one of two squares of different sizes, but with the same centre.…”

Chiral Dilithiomethane Derivatives: Structure Determination and Application in Stereoselective Reactions

“…Recent developments in low temperature diffraction and crystallisation techniques make X-ray crystallography the most powerful instrument for the structure determination of organolithiums. [17] We took advantage of this and started our investigations on the elucidation of the solid-state structures of mono-and dilithiated sulfoximines in combination with quantum chemical calculations, which have been shown to be the method of choice for the determination of the gas phase structures of lithiumorganic compounds. [18] 2.…”