Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 383-388 |
| Seitenumfang | 6 |
| Fachzeitschrift | European Journal of Inorganic Chemistry |
| Ausgabenummer | 2 |
| Publikationsstatus | Veröffentlicht - 21 Jan. 2005 |
| Extern publiziert | Ja |
Abstract
The syntheses of ferrocene- and ruthenocene-functionalized tetraazamacrocyclic ligands and their corresponding transition metal complexes are described. Reaction of N,N′-bis(2-aminoethyl)-1,3-propanediamine (2,3,2-tet) with 1,1′-diformylferrocene and 1,1′-diformylruthenocene produces the ligands fcmac and rcmac in 81-85% yield. Examination of their Cu II, Ni II, Co II, Zn II and Fe II/III complexes by IR, UV/Vis, EPR and Mössbauer spectroscopy as well as by electrochemical studies suggests electronic communication between the two metal centers of each complex. The molecular structure of [Cu II(fcmac)(FBF 3)]BF 4, determined by X-ray structure analysis, is reported and shows that the distance between the two metals is 4.54 Å. Stability constants, determined by potentiometric titration, indicate that the copper(II) complexes are of similar stability as those with unfunctionalized tetraazamacrocyclic ligands (e.g. cyclam = 1,4,8,11-tetraazacyclotetradecane); stability constants of cobalt(II) complexes are about 2 log units smaller, those of nickel(II) and zinc(II) complexes are reduced by more than 10 log units. This selectivity is discussed on the basis of the structural studies.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Anorganische Chemie
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in: European Journal of Inorganic Chemistry, Nr. 2, 21.01.2005, S. 383-388.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Electronic interactions in ferrocene- and ruthenocene-functionalized tetraazamacrcocyclic ligand complexes of Fe II/III Co II, Ni II, Ce II and Zn II
AU - Comba, Peter
AU - Linti, Gerald
AU - Merz, Kathrin
AU - Pritzkow, Hans
AU - Renz, Franz
PY - 2005/1/21
Y1 - 2005/1/21
N2 - The syntheses of ferrocene- and ruthenocene-functionalized tetraazamacrocyclic ligands and their corresponding transition metal complexes are described. Reaction of N,N′-bis(2-aminoethyl)-1,3-propanediamine (2,3,2-tet) with 1,1′-diformylferrocene and 1,1′-diformylruthenocene produces the ligands fcmac and rcmac in 81-85% yield. Examination of their Cu II, Ni II, Co II, Zn II and Fe II/III complexes by IR, UV/Vis, EPR and Mössbauer spectroscopy as well as by electrochemical studies suggests electronic communication between the two metal centers of each complex. The molecular structure of [Cu II(fcmac)(FBF 3)]BF 4, determined by X-ray structure analysis, is reported and shows that the distance between the two metals is 4.54 Å. Stability constants, determined by potentiometric titration, indicate that the copper(II) complexes are of similar stability as those with unfunctionalized tetraazamacrocyclic ligands (e.g. cyclam = 1,4,8,11-tetraazacyclotetradecane); stability constants of cobalt(II) complexes are about 2 log units smaller, those of nickel(II) and zinc(II) complexes are reduced by more than 10 log units. This selectivity is discussed on the basis of the structural studies.
AB - The syntheses of ferrocene- and ruthenocene-functionalized tetraazamacrocyclic ligands and their corresponding transition metal complexes are described. Reaction of N,N′-bis(2-aminoethyl)-1,3-propanediamine (2,3,2-tet) with 1,1′-diformylferrocene and 1,1′-diformylruthenocene produces the ligands fcmac and rcmac in 81-85% yield. Examination of their Cu II, Ni II, Co II, Zn II and Fe II/III complexes by IR, UV/Vis, EPR and Mössbauer spectroscopy as well as by electrochemical studies suggests electronic communication between the two metal centers of each complex. The molecular structure of [Cu II(fcmac)(FBF 3)]BF 4, determined by X-ray structure analysis, is reported and shows that the distance between the two metals is 4.54 Å. Stability constants, determined by potentiometric titration, indicate that the copper(II) complexes are of similar stability as those with unfunctionalized tetraazamacrocyclic ligands (e.g. cyclam = 1,4,8,11-tetraazacyclotetradecane); stability constants of cobalt(II) complexes are about 2 log units smaller, those of nickel(II) and zinc(II) complexes are reduced by more than 10 log units. This selectivity is discussed on the basis of the structural studies.
KW - Ferrocene
KW - Macrocyclic ligands
KW - Ruthenocene
KW - Transition metals
UR - http://www.scopus.com/inward/record.url?scp=13844276519&partnerID=8YFLogxK
U2 - 10.1002/ejic.200400617
DO - 10.1002/ejic.200400617
M3 - Article
AN - SCOPUS:13844276519
SP - 383
EP - 388
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
SN - 1434-1948
IS - 2
ER -