Specificity in template syntheses of hexaaza-macrobicyclic cages: [Pt(Me5-tricosatrieneN6)]4+ and [Pt(Me5-tricosaneN6)]4+Electronic supplementary information (ESI) available: tables of hydrogen atom position parameters, displacement parameters and torsional angles for all crystal structures and some electrochemical data and NMR spectral data for the hydrogenation of [Pt(Me5-tricosatrieneN6)]Cl4. See http://www.rsc.org/suppdata/ob/b2/b212326f/

2003 ◽  
Vol 1 (9) ◽  
pp. 1598-1608 ◽  
Author(s):  
Kylie N. Brown ◽  
Rodney J. Geue ◽  
Trevor W. Hambley ◽  
David C. R. Hockless ◽  
A. David Rae ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Crystal Structures ◽  
Spectral Data ◽  
Supplementary Information ◽  
Hydrogen Atom Position ◽  
Electronic Supplementary Information ◽  
Torsional Angles ◽  
Atom Position

Syntheses, Crystal Structures and an Overview of Alkali Metal Maleates

2009 ◽  
Vol 64 (5) ◽  
pp. 517-524 ◽  
Author(s):  
Michel Fleck ◽  
Ladislav Bohatý
Keyword(s):  
Hydrogen Bond ◽  
Crystal Structures ◽  
Maleic Acid ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
Space Group ◽  
Hydrogen Atom Position ◽  
Potassium Hydrogen ◽  
Intramolecular Hydrogen ◽  
Atom Position

The crystal structures of four alkali salts of maleic acid have been determined by single crystal X-ray diffraction: crystals of rubidium hydrogen maleate, RbH(C4H2O4), are very nearly centrosymmetrical, i. e., only one hydrogen atom position in the crystal structure violates the centrosymmetry. Thus, the space group is Pbc21 rather than Pbcm. The compound is isotypic with potassium hydrogen maleate, KH(C4H2O4), which has previously been described in space group Pbcm. It has been reinvestigated to prove that the correct space group is also Pbc21. The isotypic pair of rubidium hydrogen maleate maleic acid, RbH(C4H2O4) H2(C4H2O4), and caesium hydrogen maleate maleic acid, CsH(C4H2O4)H2(C4H2O4), crystallise in the triclinic space group P1̄. The geometry of the maleate units in these compounds corresponds well to data of other metal maleates. The only significant variation, concerning the intra-anionic hydrogen bond, is discussed. Furthermore, an overview of previously reported metal maleate structures is given, with special regard to the symmetry of the intramolecular hydrogen bond.

Sign in / Sign up

Export Citation Format

Share Document