Abstract
Additional studies of solution phase recognition of Ru(NH3)x(pyridine)y2+, Ru(NH3)x(2,2′-bipyridine)y2+ and Ru(NH3)4(1,10-phenantroline)2+ species by dibenzo crown ethers are reported. The factors most closely examined were crown size, ammine ligand content and ancillary ligand composition. The overall study confirms that recognition or association derives primarily from H-bond formation (ammine hydrogen/ether oxygen. Evidently opposing these interactions, however, are crown conformational rearrangements. Consequently, straight-forward correlatins between association strength and potential number of H-bond interactions are found only in selected cases. Based on comparisons of association constants for (bis) pyridine, bipyridine and phenanthroline ligand-containing species with dibenzo crowns, evidence is also found for favorable polypyridine/benzene interactions. NMR (NOE) measurements indicate that the preferred association geometrics in solution are those that make each of the benzenes of the crown coplanar (or nearly coplanar) with the ligated polypyridine.
| Original language | English |
|---|---|
| Pages (from-to) | 285-289 |
| Number of pages | 5 |
| Journal | Inorganica Chimica Acta |
| Volume | 240 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 1995 |
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Keywords
- Ammine complexes
- Macrocyclic ether complexes
- Molecular recognition
- Ruthenium comlexes
ASJC Scopus subject areas
- Inorganic Chemistry
- Physical and Theoretical Chemistry
- Materials Chemistry
Cite this
Selective recognition of metal complexes by macrocyclic ethers : further observations on the macrocycle size dependence and the first-sphere ligand composition dependence of recognition thermodynamics. / Xiao Lian Zhang, Lian Zhang; Yoon, Dong I.; Hupp, Joseph T.
In: Inorganica Chimica Acta, Vol. 240, No. 1-2, 1995, p. 285-289.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Selective recognition of metal complexes by macrocyclic ethers
T2 - further observations on the macrocycle size dependence and the first-sphere ligand composition dependence of recognition thermodynamics
AU - Xiao Lian Zhang, Lian Zhang
AU - Yoon, Dong I.
AU - Hupp, Joseph T
PY - 1995
Y1 - 1995
N2 - Additional studies of solution phase recognition of Ru(NH3)x(pyridine)y2+, Ru(NH3)x(2,2′-bipyridine)y2+ and Ru(NH3)4(1,10-phenantroline)2+ species by dibenzo crown ethers are reported. The factors most closely examined were crown size, ammine ligand content and ancillary ligand composition. The overall study confirms that recognition or association derives primarily from H-bond formation (ammine hydrogen/ether oxygen. Evidently opposing these interactions, however, are crown conformational rearrangements. Consequently, straight-forward correlatins between association strength and potential number of H-bond interactions are found only in selected cases. Based on comparisons of association constants for (bis) pyridine, bipyridine and phenanthroline ligand-containing species with dibenzo crowns, evidence is also found for favorable polypyridine/benzene interactions. NMR (NOE) measurements indicate that the preferred association geometrics in solution are those that make each of the benzenes of the crown coplanar (or nearly coplanar) with the ligated polypyridine.
AB - Additional studies of solution phase recognition of Ru(NH3)x(pyridine)y2+, Ru(NH3)x(2,2′-bipyridine)y2+ and Ru(NH3)4(1,10-phenantroline)2+ species by dibenzo crown ethers are reported. The factors most closely examined were crown size, ammine ligand content and ancillary ligand composition. The overall study confirms that recognition or association derives primarily from H-bond formation (ammine hydrogen/ether oxygen. Evidently opposing these interactions, however, are crown conformational rearrangements. Consequently, straight-forward correlatins between association strength and potential number of H-bond interactions are found only in selected cases. Based on comparisons of association constants for (bis) pyridine, bipyridine and phenanthroline ligand-containing species with dibenzo crowns, evidence is also found for favorable polypyridine/benzene interactions. NMR (NOE) measurements indicate that the preferred association geometrics in solution are those that make each of the benzenes of the crown coplanar (or nearly coplanar) with the ligated polypyridine.
KW - Ammine complexes
KW - Macrocyclic ether complexes
KW - Molecular recognition
KW - Ruthenium comlexes
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UR - http://www.scopus.com/inward/citedby.url?scp=0000596286&partnerID=8YFLogxK
U2 - 10.1016/0020-1693(96)83101-X
DO - 10.1016/0020-1693(96)83101-X
M3 - Article
VL - 240
SP - 285
EP - 289
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
SN - 0020-1693
IS - 1-2
ER -