Unit Cell Of Complex Research Articles

Crystal Structures of the (−)‐DIOP Complexes of Nickel, Palladium and Platinum Dichloride

AbstractThe crystal structures of PdCl2[(−)‐DIOP], PtCl2[(−)‐DIOP] and of NiCl2‐[(−)‐DIOP] have been determined by X‐ray analysis and refined by least‐squares methods [(−)‐DIOP=(−)‐2,2‐dimethyl‐4,5‐bis(diphenylphosphinomethyl)‐1,3‐dioxolane]. The coordination around the nickel atom is tetrahedral, the coordination around palladium and platinum is square planar. The unit cell of the palladium complex contains two non‐equivalent molecules with different conformations of the seven‐membered chelate ring involving the metal and the two phosphorus atoms. PtCl2[(−)‐DIOP] is isostructural with the corresponding palladium complex.

Single crystals of amylose V complexes.

AbstractIn the present paper our previous results and Manley's results for single crystals of amylose V complexes are confirmed. A reasonable interpretation of electron diffraction patterns from lamellar crystals of the monohydrated complex and of the anhydrous complex is presented. It is concluded that the longer side of rectangular lamellae corresponds to the a axis of the unit cell of the wet complex, and that the crystal structure does not have hexagonal symmetry at the time when the lamellar crystals are formed in the supercooled solution. The mode of chain packing in the single crystals is described and discussed.