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Metalloporphyrins. The nature of ligand bonding and the mechanism of replacements
Croatica Chemica Acta, 69 (1996), 4; 1305-1328. urn:nbn:hr:163:315859
Ašperger, Smiljko; Cetina-Čižmek, Biserka

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Ašperger, S. & Cetina Čižmek, B. (1996). Metalloporphyrins. The nature of ligand bonding and the mechanism of replacements. Croatica Chemica Acta, 69. (4), 1305-1328. Retrieved from https://urn.nsk.hr/urn:nbn:hr:163:315859

Ašperger, Smiljko and Biserka Cetina Čižmek. "Metalloporphyrins. The nature of ligand bonding and the mechanism of replacements." Croatica Chemica Acta, vol. 69, no. 4, 1996, pp. 1305-1328. https://urn.nsk.hr/urn:nbn:hr:163:315859

Ašperger, Smiljko and Biserka Cetina Čižmek. "Metalloporphyrins. The nature of ligand bonding and the mechanism of replacements." Croatica Chemica Acta 69, no. 4 (1996): 1305-1328. https://urn.nsk.hr/urn:nbn:hr:163:315859

Ašperger, S. and Cetina Čižmek, B. (1996) 'Metalloporphyrins. The nature of ligand bonding and the mechanism of replacements', Croatica Chemica Acta, 69(4), pp. 1305-1328. Available at: https://urn.nsk.hr/urn:nbn:hr:163:315859 (Accessed 30 December 2024)

Ašperger S, Cetina Čižmek B. Metalloporphyrins. The nature of ligand bonding and the mechanism of replacements. Croatica Chemica Acta [Internet]. 1996 [cited 2024 December 30];69(4):1305-1328. Available at: https://urn.nsk.hr/urn:nbn:hr:163:315859

S. Ašperger and B. Cetina Čižmek, "Metalloporphyrins. The nature of ligand bonding and the mechanism of replacements", Croatica Chemica Acta, vol. 69, no. 4, pp. 1305-1328, 1996. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:163:315859. [Accessed: 30 December 2024]

Metadata
Title (english)Metalloporphyrins. The nature of ligand bonding and the mechanism of replacements
AuthorSmiljko Ašperger
AuthorBiserka Cetina-Čižmek
Author's institutionUniversity of Zagreb
Faculty of Pharmacy and Biochemistry
(Department of physical chemistry)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Physical Chemistry
Abstract (english)
The imidazole ring is an essential component of many biological systems (hemoglobin and myoglobin, nucleic acids, vitamin B^, cytochromes, metalloenzymes, etc.). The nature of the bond between imidazole-nitrogen and the metal is therefore of biological interest. Imidazole is an electron-donating ligand in both a and n sense, much more electron donating than the majority of nitrogen heterocycles. As ligands, most imidazoles are good a donors and moderate n donors. They can also function as n acceptors if the imidazole ring has one or more electron-withdrawing substituents. Our recent study of bonding modes of pyridine and imidazole type ligands in the transition state of a Conl(protoporphyrin IX) model complex enabled us to conclude that stabilization of the reaction transition state is more sensitive to the change in the strength of n bonding than in that of a bonding. This observation is important for some metallo-enzymatic reactions. Mechanisms of replacements in porphyrin and in corrin rings are discussed.
Languageenglish
Publication typeOther - Other
Publication statusPublished
Peer reviewPeer review
Publication versionPublished version
Journal titleCroatica Chemica Acta
Numberingvol. 69, no. 4, pp. 1305-1328
p-ISSN0011-1643
e-ISSN1334-417X
URN:NBNurn:nbn:hr:163:315859
Publication1996
Document URLhttps://hrcak.srce.hr/135971
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2020-04-29 14:35:08