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Titolo:
The crystal supramolecularity of metal phenanthroline complexes
Autore:
Russell, V; Scudder, M; Dance, I;
Indirizzi:
Univ New S Wales, Sch Chem, Sydney, NSW 2052, Australia Univ New S Wales Sydney NSW Australia 2052 m, Sydney, NSW 2052, Australia
Titolo Testata:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
fascicolo: 6, , anno: 2001,
pagine: 789 - 799
SICI:
1472-7773(2001):6<789:TCSOMP>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
MULTIPLE PHENYL EMBRACES; SPIN-STATE TRANSITIONS; TRIS(DIIMINE)RUTHENIUM(II) COMPLEXES; HIGH-SPIN->LOW-SPIN RELAXATION; PH(4)P(+) CATIONS; TRISPHAT ANIONS; MOTIFS;
Keywords:
coordination chemistry; crystal engineering; molecular recognition; supramolecular chemistry; intramolecular interactions;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Dance, I Univ New S Wales, Sch Chem, Sydney, NSW 2052, Australia Univ New S Wales Sydney NSW Australia 2052 , NSW 2052, Australia
Citazione:
V. Russell et al., "The crystal supramolecularity of metal phenanthroline complexes", J CHEM S DA, (6), 2001, pp. 789-799

Abstract

The 1,10-phenanthroline (phen) ligand in metal complexes commonly forms offset face-to-face (OFF) motifs, and less frequently edge-to-face (EF) motifs. An investigation of the 335 M(phen) complexes, 159 M(phen)(2) complexes,and 33 M(phen)(3) complexes in the Cambridge Structural Database has revealed that in crystals these primary OFF and EF motifs combine to form concerted motifs, and extended motifs, in a variety of ways. Stacks of phen ligands engaging OFF motifs on both faces are very common for complexes M(phen) and M(phen)(2). Even more common for M(phen)(2) are zigzag chains in which each phen ligand links to neighbours in the chain with an OFF motif. The parallel fourfold aryl embrace (P4AE, comprised of one OFF and two EF) occursfor complexes M(phen)(2) and M(phen)(3), with some variety in geometry between a single OFF at one extreme to (EF)(2) at the other. This variability in the P4AE is a consequence of the larger surface area of the phen ligand,compared with those of 2,2'-bipyridyl (bipy) ligands or phenyl groups (which also form this motif), and has been evaluated by calculations of the supramolecular attractive energies. The P4AE associate further, maximising theuse of phen surfaces, to form chains of P4AE, chains of P4AE . OFF, and compact two-dimensional nets propagated by both P4AE and OFF motifs. There are examples of three-dimensional nets using these motifs. There is a notableabsence of sixfold aryl embraces (6AE, comprised of concerted (EF)(6)) amongst M(phen)(3) complexes, and a clear difference with M(bipy)(3) complexeswhere 6AEs are prevalent. Various M(phen)(2) and M(phen)(3) complexes packin crystals to form tight hydrophobic domains, often as slabs, segregated from hydrophilic domains containing hydrogen bonding components and anions. The crystallisation and crystal packing of [Co(phen)(3)][BF4](2).H2O . EtOH, which exemplifies this pattern, are reported. The implications for crystal engineered enantioselection by [M(phen)(3)] complexes are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 16:06:05