The structure of the palladium(II) and zinc(II) complexes of α,β,γ,δ-tetrakis(3,5-di-<i>tert</i>-butyl-4-hydroxyphenyl)porphyrin

Golder, Andrew J.; Nolan, Kevin B.; Povey, David C.; Milgrom, Lionel R.

doi:10.1107/s0108270188006894

Cited by 23 publications

(15 citation statements)

References 13 publications

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“…The degree of ruffling in the structure of Pd(II)8 (D24 = 0.22 Å ), which was determined for comparative purposes, is similar to that found in Cu(II)8 (D24 = 0.24 Å ) but less than that found in Ni(II)8 (D24 = 0.36 Å ). Both planar and distorted Pd(II) porphyrins have been described in the literature and the average Pd-N bond length of 2.010(7) Å for Pd(II)8 lies within the expected range [28,[31][32][33].…”

Section: Bearing Meso-ch-(c-spmentioning

confidence: 93%

Synthesis, Reactivity and Structural Chemistry of 5,10,15,20-Tetraalkylporphyrins

Senge

Bischoff

Nelson

et al. 1999

J. Porphyrins Phthalocyanines

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The synthesis, reactivity and full characterization of a series of meso-tetraalkyl porphyrins and metalloporphyrins with R ≡ n-butyl (6), 2-methyl-propyl (7), isopropyl (8), l-ethyl-propyl (10) and tert-butyl (11) groups are reported. Derivatives of the last of these show considerably bathochromically shifted absorption bands and the crystal structure of Zn ( II )11(pyr) exhibits a severely ruffled macrocycle conformation. Systematic crystallographic studies of the porphyrins showed that the free base porphyrins with R ≡ n-butyl ( H 26), 2-methyl-propyl ( H 27) and 1-ethyl-propyl ( H 210) are planar. A larger conformational variety was found for the metal complexes. While most Ni ( II ) derivatives and Pd ( II )8 showed a ruffled macrocycle conformation with a degree of ruffling exceeding that of meso-unsubstituted porphyrins, both planar and non-planar forms were found for the related Cu ( II ) derivatives. The Zn ( II ) complexes of porphyrins with isopropyl or 1-ethyl-propyl exhibited conformations with variable degree of distortion. Together with comparative structures from the literature, this study provides experimental evidence that considerable conformational flexibility exists for meso-alkylporphyrins with substituents less bulky than tert-butyl groups.

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Section: Bearing Meso-ch-(c-spmentioning

confidence: 93%

Synthesis, Reactivity and Structural Chemistry of 5,10,15,20-Tetraalkylporphyrins

Senge

Bischoff

Nelson

et al. 1999

J. Porphyrins Phthalocyanines

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“…The ligand itself was found to expand upon coordination of the Pd II ion. This (19) 127.0(3) 125.33 (17) was deduced from the fact that the inner bond angles of the bipyrrole linkage N(2)ϪC(9)ϪC (10) (7) and 163.08(7)°; Figure 3}. The distance between the terminal methyl groups, however, increased in the Pd II complex from 3.34 to 3.48 Å .…”

Section: Molecular Structures Of 6 Andmentioning

confidence: 99%

Structural and Spectroelectrochemical Studies on (2,2′-Bidipyrrinato)copper(II) and -palladium(II) Complexes

Bröring

Brandt

Bley-Escrich³

et al. 2002

Eur. J. Inorg. Chem.

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Copper(II) and palladium(II) complexes of two 2,2′‐bidipyrrin ligands were prepared and examined, in comparison with the known nickel(II) complexes of these ligands, by means of X‐ray crystallography, cyclic voltammetry, and spectroelectrochemistry. All compounds are of helical geometry with coordination environments of the metal centres displaying very small tetrahedral distortions for palladium and very large ones for copper complexes. Porphyrinoid behaviour was found for the one‐ and two‐electron oxidations of all complexes studied, as well as for the reductions of the PdII species. On the other hand, the reduction of the CuII complexes shows some special features, which may be explained from the results of spectroelectrochemical studies as related to the particular non‐planarity of these compounds. (© Wiley‐VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)

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“…The building blocks used to construct the various dyads studied in this work were taken from the CSD database. The refcodes of the porphyrin and quaterthiophene structures selected are, respectively, GOBSUL69 and ZORNUP 63. All geometries were completely optimized, that is, no restrictions in geometry were assumed, and all degrees of freedom were optimized.…”

Section: Methodsmentioning

confidence: 99%

Expanding the Scope of Laccase‐Mediator Systems

et al. 2013

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The laccase‐mediator system (LMS) for the regeneration of oxidised nicotinamide co‐factors was revisited to broaden the mediator scope. Among the 18 mediators screened, acetosyringone, syringaldehyde and caffeic acid excelled with respect to activity and stability under process conditions. The LMS based on the laccase from Myceliophthora thermophila and acetosyringone was further investigated and applied to promote the nicotinamide adenine dinucleotide (NAD+)‐dependent oxidation of glucose as well as the oxidative lactonisation of 1,4‐butanediol to the corresponding γ‐butyrolactone.

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The structure of the palladium(II) and zinc(II) complexes of α,β,γ,δ-tetrakis(3,5-di-tert-butyl-4-hydroxyphenyl)porphyrin

Cited by 23 publications

References 13 publications

Synthesis, Reactivity and Structural Chemistry of 5,10,15,20-Tetraalkylporphyrins

Synthesis, Reactivity and Structural Chemistry of 5,10,15,20-Tetraalkylporphyrins

Structural and Spectroelectrochemical Studies on (2,2′-Bidipyrrinato)copper(II) and -palladium(II) Complexes

Expanding the Scope of Laccase‐Mediator Systems

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