FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2078203652> ?p ?o ?g. }

• W2078203652 endingPage "8436" @default.
• W2078203652 startingPage "8427" @default.
• W2078203652 abstract "A new pentanuclear bis(triple-helical) manganese complex has been isolated and characterized by X-ray diffraction in two oxidation states: [{Mn(II)(μ-bpp)(3)}(2)Mn(II)(2)Mn(III)(μ-O)](3+) (1(3+)) and [{Mn(II)(μ-bpp)(3)}(2)Mn(II)Mn(III)(2)(μ-O)](4+) (1(4+)). The structure consists of a central {Mn(3)(μ(3)-O)} core of Mn(II)(2)Mn(III) (1(3+)) or Mn(II)Mn(III)(2) ions (1(4+)) which is connected to two apical Mn(II) ions through six bpp(-) ligands. Both cations have a triple-stranded helicate configuration, and a pair of enantiomers is present in each crystal. The redox properties of 1(3+) have been investigated in CH(3)CN. A series of five distinct and reversible one-electron waves is observed in the -1.0 and +1.50 V potential range, assigned to the Mn(II)(4)Mn(III)/Mn(II)(5), Mn(II)(3)Mn(III)(2)/Mn(II)(4)Mn(III), Mn(II)(2)Mn(III)(3)/Mn(II)(3)Mn(III)(2), Mn(II)Mn(III)(4)/Mn(II)(2)Mn(III)(3), and Mn(III)(5)/Mn(II)Mn(III)(4) redox couples. The two first oxidation processes leading to Mn(II)(3)Mn(III)(2) (1(4+)) and Mn(II)(2)Mn(III)(3) (1(5+)) are related to the oxidation of the Mn(II) ions of the central core and the two higher oxidation waves, close in potential, are thus assigned to the oxidation of the two apical Mn(II) ions. The 1(4+) and 1(5+) oxidized species and the reduced Mn(4)(II) (1(2+)) species are quantitatively generated by bulk electrolyses demonstrating the high stability of the pentanuclear structure in four oxidation states (1(2+) to 1(5+)). The spectroscopic characteristics (X-band electron paramagnetic resonance, EPR, and UV-visible) of these species are also described as well as the magnetic properties of 1(3+) and 1(4+) in solid state. The powder X- and Q-band EPR signature of 1(3+) corresponds to an S = 5/2 spin state characterized by a small zero-field splitting parameter (|D| = 0.071 cm(-1)) attributed to the two apical Mn(II) ions. At 40 K, the magnetic behavior is consistent for 1(3+) with two apical S = 5/2 {Mn(II)(bpp)(3)}(-) and one S = 2 noninteracting spins (11.75 cm(3) K mol(-1)), and for 1(4+) with three S = 5/2 noninteracting spins (13.125 cm(3) K mol(-1)) suggesting that the {Mn(II)(2)Mn(III)(μ(3)-O)}(5+) and {Mn(II)Mn(III)(2)(μ(3)-O)}(6+) cores behave at low temperature like S = 2 and S = 5/2 spin centers, respectively. The thermal behavior below 40 K highlights the presence of intracomplex magnetic interactions between the two apical spins and the central core, which is antiferromagnetic for 1(3+) leading to an S(T) = 3 and ferromagnetic for 1(4+) giving thus an S(T) = 15/2 ground state." @default.
• W2078203652 created "2016-06-24" @default.
• W2078203652 creator A5000683322 @default.
• W2078203652 creator A5002581586 @default.
• W2078203652 creator A5002751955 @default.
• W2078203652 creator A5003571345 @default.
• W2078203652 creator A5005120127 @default.
• W2078203652 creator A5008712662 @default.
• W2078203652 creator A5029910752 @default.
• W2078203652 creator A5031459453 @default.
• W2078203652 creator A5035414152 @default.
• W2078203652 creator A5042617557 @default.
• W2078203652 creator A5050334426 @default.
• W2078203652 creator A5056139874 @default.
• W2078203652 creator A5062587397 @default.
• W2078203652 date "2011-08-03" @default.
• W2078203652 modified "2023-10-13" @default.
• W2078203652 title "Multireversible Redox Processes in Pentanuclear Bis(Triple-Helical) Manganese Complexes Featuring an Oxo-Centered triangular {Mn^II₂Mn^III(μ₃-O)}⁵⁺ or {Mn^IIMn^III₂(μ₃-O)}⁶⁺ Core Wrapped by Two {Mn^II₂(bpp)₃}⁻" @default.
• W2078203652 cites W1488004395 @default.
• W2078203652 cites W1565595557 @default.
• W2078203652 cites W1971276108 @default.
• W2078203652 cites W1971591000 @default.
• W2078203652 cites W1972082277 @default.
• W2078203652 cites W1977633617 @default.
• W2078203652 cites W1980289948 @default.
• W2078203652 cites W1981081155 @default.
• W2078203652 cites W1981850846 @default.
• W2078203652 cites W1987275920 @default.
• W2078203652 cites W1987829384 @default.
• W2078203652 cites W1988290070 @default.
• W2078203652 cites W1988535282 @default.
• W2078203652 cites W1989633717 @default.
• W2078203652 cites W1990654323 @default.
• W2078203652 cites W1991215496 @default.
• W2078203652 cites W1997208930 @default.
• W2078203652 cites W1997310073 @default.
• W2078203652 cites W1997331126 @default.
• W2078203652 cites W1999383785 @default.
• W2078203652 cites W2001050756 @default.
• W2078203652 cites W2004143465 @default.
• W2078203652 cites W2005853686 @default.
• W2078203652 cites W2007492768 @default.
• W2078203652 cites W2011919641 @default.
• W2078203652 cites W2012796644 @default.
• W2078203652 cites W2012972650 @default.
• W2078203652 cites W2015022049 @default.
• W2078203652 cites W2018951964 @default.
• W2078203652 cites W2023154437 @default.
• W2078203652 cites W2023471221 @default.
• W2078203652 cites W2034096830 @default.
• W2078203652 cites W2036135805 @default.
• W2078203652 cites W2036845081 @default.
• W2078203652 cites W2037053053 @default.
• W2078203652 cites W2040883641 @default.
• W2078203652 cites W2041255822 @default.
• W2078203652 cites W2041572929 @default.
• W2078203652 cites W2044742408 @default.
• W2078203652 cites W2044952194 @default.
• W2078203652 cites W2048503566 @default.
• W2078203652 cites W2050586175 @default.
• W2078203652 cites W2052444571 @default.
• W2078203652 cites W2054214983 @default.
• W2078203652 cites W2057049928 @default.
• W2078203652 cites W2058528394 @default.
• W2078203652 cites W2059539984 @default.
• W2078203652 cites W2060995466 @default.
• W2078203652 cites W2062792508 @default.
• W2078203652 cites W2066443439 @default.
• W2078203652 cites W2069315986 @default.
• W2078203652 cites W2073822863 @default.
• W2078203652 cites W2074353721 @default.
• W2078203652 cites W2074900494 @default.
• W2078203652 cites W2075755969 @default.
• W2078203652 cites W2078263961 @default.
• W2078203652 cites W2078483323 @default.
• W2078203652 cites W2078834111 @default.
• W2078203652 cites W2079468422 @default.
• W2078203652 cites W2086535733 @default.
• W2078203652 cites W2086573906 @default.
• W2078203652 cites W2087006788 @default.
• W2078203652 cites W2087011263 @default.
• W2078203652 cites W2091658713 @default.
• W2078203652 cites W2091874093 @default.
• W2078203652 cites W2092500291 @default.
• W2078203652 cites W2092747649 @default.
• W2078203652 cites W2096216193 @default.
• W2078203652 cites W2096439074 @default.
• W2078203652 cites W2100587299 @default.
• W2078203652 cites W2100630020 @default.
• W2078203652 cites W2112464819 @default.
• W2078203652 cites W2113158614 @default.
• W2078203652 cites W2116345172 @default.
• W2078203652 cites W2128778692 @default.
• W2078203652 cites W2128806311 @default.
• W2078203652 cites W2128892665 @default.
• W2078203652 cites W2131350133 @default.
• W2078203652 cites W2134382965 @default.
• W2078203652 cites W2144571511 @default.

• next