Crystal engineering based on mirror image recognition

Abstract

s13.m42.o1 Structural manipulation of hydrogen-bonded networks -inclusion of metal centres and chromophores and response to loss of symmetry.

Reactions of m-chloroperoxybenzoic acid with dimeric cyclopalladated complexes derived from 2-phenyl-2-oxazolines

“…As such, they should have a stronger bond to the metal and therefore a greater trans-influence on the Pd-C bond compared to bridging Cl and AcO ligands. To illustrate, the Pd-C bond length in the dimeric chloro-bridged CPC of (R)-1-phenylethylamine is 1.946 Å , while the same bond trans to the monodentate Cl ligand in the corresponding mononuclear complex PPh 3 adduct is longer, 1.971 Å (the average for two independent molecules) [64]. Because the reactions of CPCs 1a,b and 7a,b in MeCN provided higher yields of oxidation products, it appears that the monodentate Cl and OAc ligands not only lengthened the Pd-C bond but also increased the nucleophilicity of the carbon bonded to the metal.…”

(S)-[2-(1-Aminoethyl)phenyl]chloro(3-chloropyridine)palladium(II) acetone 0.25-solvate

“…The dinuclear intermediates in the scheme have been prepared according to the procedures of Fuchita et al (1997) and Vicente et al (1997). Structural characterizations of the products (2) and (3) of the cyclopalladation reaction pathway for unsubstituted and parasubstituted primary amines have already been published (Calmuschi & Englert, 2002;Calmuschi, Alesi & Englert, 2004;Calmuschi, Jonas & Englert, 2004). Reaction of the dinuclear chloro complex (2) (0.5 mmol, 0.262 g) with a Lewis base (in this case 3-chloropyridine, 1.1 mmol, 0.125 g) in dichloromethane (40 ml) results in precipitation of the monomeric complex (3) as a light-yellow crystalline powder.…”

Robust packing in cyclopalladated primary amines: isomorphous crystal structures of four complexes with varying substitution patterns

“…Contributions by Dunina et al (1999), Fuchita and coworkers (Fuchita & Tsuchiya, 1993;Fuchita et al, 1995Fuchita et al, , 1997 and Vicente et al (1993Vicente et al ( , 1995Vicente et al ( , 1997Vicente et al ( , 2003 paved the way towards more general substrates. We have structurally characterized reaction products and intermediates (Calmuschi & Englert, 2002;Calmuschi, Jonas & Englert, 2004;Calmuschi-Cula et al, 2005) and have used the target molecules in crystal engineering (Calmuschi, Alesi & Englert, 2004;. In this context, we previously reported (Calmuschi & Englert, 2002) pronounced pseudosymmetry in the crystal structure of the enantiomerically pure complex…”

“…We have structurally characterized reaction products and intermediates (Calmuschi & Englert, 2002;Calmuschi, Jonas & Englert, 2004;Calmuschi-Cula et al, 2005) and have used the target molecules in crystal engineering (Calmuschi, Alesi & Englert, 2004;. In this context, we previously reported (Calmuschi & Englert, 2002) pronounced pseudosymmetry in the crystal structure of the enantiomerically pure complex…”