Cations Cambridge Structural Database

A number of papers deal with aspects of [Ru(phen)3] ". In the solid state, [Ru(phen)3] PF6]2 consists of racemic layers of cations, between which the anions reside. This contrasts with the structure of [Ru(bpy)3][PFg]2 which possesses homochiral layers. Racemic layers of [Ru(phen)3] " " cations are observed in the perchlorate salt. The structure of A-[Ru(phen)3][PF6]2 has been determined. Data for 335 M(phen), 159 M(phen)2, and 33M(phen)3 complexes from the Cambridge Structural Database have been analyzed and show that offset face-to-face inter-phen interactions are more common that edge-to-face interactions. ... 

The 71 subunits, ethene and benzene, differing in both size as well as topology, but containing the same tetra-substitution pattern, seem to approach identity15,16. ESR spin delocalization data of their organosilicon radical cations as well as additional information from own structures of sterically overcrowded molecules and many more registered in the Cambridge Structural Database stimulate speculation that both tetra-substituted molecules... 

Reactions. - The equilibrium acidities (pKha) of six p-substituted benzyltriphenylphosphonium salts, and also those of related allylphosphonium salts, have been determined, together with the homolytic bond dissociation enthalpies of the acidic C-H bonds. A study of the data available in the Cambridge Structural Database reveals that tetraphenylphosphonium cations in crystals associate through phenyl-phenyl non-bonded interactions which are attractive, concerted, and widespread in nature. An attractive force of 60-85 kJmoP has been calculated. ... 

The Cambridge Structural Database, p. 161 Cation-n interactions p. 214 Concepts in Crystal Engineering, p. 319 Crystal Engineering with Hydrogen Bonds, p. 357 DNA Nanotechnology, p. 475 Halogen Bonding, p. 628... 

D. Haynes, W. Jones, and W. Motherwell, Occurrence of pharmaceutically acceptable anions and cations in the Cambridge structural database, J. Pharm. ScL, 94, 2111-2120 (2005). 

The coordination mode of the dithiophosphate ligands and the overall geometry of the complex (shown in Fig. 2.4, bottom) match what is known in the literature. Several lanthanide dithiophosphate complexes are published in the Cambridge Structural Database (CSD) [36], and they fall in one of the three categories anionic complexes with four dithiophosphate ligands [37,38], neutral complexes with three dithiophosphate ligands and two neutral unidentate ligands [39—43], and cationic... 

Figure 3. X-ray crystal structures of (a) the chloride complex of m o-octamethylcalix[4]pyrrole 1 m-Bu4NCI CH2Cl2 and (b) the fluoride complex of meso-tetraspirocyclohexylcalix[4]pyrrole 2m-Bu4NF. Counter cations and solvent molecules are omitted for clarity. Crystal structures originally published in Gale, P. A. Sessler,). L. Krai, V. Lynch, V. /. Am. Chem. Soc. 1996, 118, 5140. Diagram produced using data from the Cambridge Crystallographic Database,...

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