Cis-/Trans-Isomerie bei Bis-(trisalkoxy)-hexavanadaten - Cis-Na2[V-6(IV)O-7(OH)(6)((OCH2)(3)CCH2OH)(2)) · 8H2O, cis-(CN3H6)3[V-5(IV)O-V(13)((OCH2)(3)CCH2OH)(2)] · 4,5H(2)O und trans-(CN3H6)(2)[V-6(V)O-13((OCH2)(3)CCH2OH)(2)] · H2O

Müller A, Meyer J, Bögge H, Stammler A, Botar A (1995)
ZEITSCHRIFT FÜR ANORGANISCHE UND ALLGEMEINE CHEMIE 621(11): 1818-1831.

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Cis-/Trans-isomerism of Bis-(trisalkoxy)-hexavanadates - Cis-Na2[V-6(IV)O-7(OH)(6)((OCH2)(3)CCH2OH)(2)) · 8H2O, Cis-(CN3H6)3[V-5(IV)O-V(13)((OCH2)(3)CCH2OH)(2)] · 4,5H2O and trans-(CN3H6)(2)[V-6(V)O-13((OCH2)(3)CCH2OH)(2)] ·H2O
Abstract
Polyoxovanadates with distorted Lindquist-structure, in which six of the twelve mu(2)-oxygen atoms are formally replaced by the oxygen atoms of two coordinated pentaerythritol ligands, can be prepared by a simple method in an aqueous medium. The ''fully reduced'', six-fold protonated compound cis-(Na2V6O7)-O-V(OH)(6){(OCH2)(3)CCH2OH}(2)]. 8H(2)O (1), the mixed valence species cis-(CN3H6)(3)[(VV5O13)-V-IV-O-V{[(OCH2)(3)CCH2OH}(2)]. 4.5H(2)O (2) containing one localized V-IV centre and the ''fully oxidized'' compound trans-(CN3H6)(2)[(V6O13)-O-V{(OCH2)(3)CCH2 . OH}(2)]. H2O (3) have been synthesized and characterized by UV/VIS-, IR- and EPR-spectroscopy, by magnetic measurements, cyclic voltammetry and by a single-crystal X-ray structure analysis. The organic {(CH2)(3)CCH2OH}(3+)-groups tend to cap the triangular faces formed by mu(2)-oxygen atoms of the central approximately octahedral {V6O19}-unit. Therefore the anions of bis-(trisalkoxy)-hexavanadates can exist in a trans-form as well as in an isomeric cis-form referring to a ''basic'' plane of four vanadium atoms of the [V-6]-octahedron. The different relative positions of the ligands have a significant influence on the redox potentials of the compounds. For structural details see ''Inhaltsiibersicht''.
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Müller A, Meyer J, Bögge H, Stammler A, Botar A. Cis-/Trans-Isomerie bei Bis-(trisalkoxy)-hexavanadaten - Cis-Na2[V-6(IV)O-7(OH)(6)((OCH2)(3)CCH2OH)(2)) · 8H2O, cis-(CN3H6)3[V-5(IV)O-V(13)((OCH2)(3)CCH2OH)(2)] · 4,5H(2)O und trans-(CN3H6)(2)[V-6(V)O-13((OCH2)(3)CCH2OH)(2)] · H2O. ZEITSCHRIFT FÜR ANORGANISCHE UND ALLGEMEINE CHEMIE. 1995;621(11):1818-1831.
Müller, A., Meyer, J., Bögge, H., Stammler, A., & Botar, A. (1995). Cis-/Trans-Isomerie bei Bis-(trisalkoxy)-hexavanadaten - Cis-Na2[V-6(IV)O-7(OH)(6)((OCH2)(3)CCH2OH)(2)) · 8H2O, cis-(CN3H6)3[V-5(IV)O-V(13)((OCH2)(3)CCH2OH)(2)] · 4,5H(2)O und trans-(CN3H6)(2)[V-6(V)O-13((OCH2)(3)CCH2OH)(2)] · H2O. ZEITSCHRIFT FÜR ANORGANISCHE UND ALLGEMEINE CHEMIE, 621(11), 1818-1831.
Müller, A., Meyer, J., Bögge, H., Stammler, A., and Botar, A. (1995). Cis-/Trans-Isomerie bei Bis-(trisalkoxy)-hexavanadaten - Cis-Na2[V-6(IV)O-7(OH)(6)((OCH2)(3)CCH2OH)(2)) · 8H2O, cis-(CN3H6)3[V-5(IV)O-V(13)((OCH2)(3)CCH2OH)(2)] · 4,5H(2)O und trans-(CN3H6)(2)[V-6(V)O-13((OCH2)(3)CCH2OH)(2)] · H2O. ZEITSCHRIFT FÜR ANORGANISCHE UND ALLGEMEINE CHEMIE 621, 1818-1831.
Müller, A., et al., 1995. Cis-/Trans-Isomerie bei Bis-(trisalkoxy)-hexavanadaten - Cis-Na2[V-6(IV)O-7(OH)(6)((OCH2)(3)CCH2OH)(2)) · 8H2O, cis-(CN3H6)3[V-5(IV)O-V(13)((OCH2)(3)CCH2OH)(2)] · 4,5H(2)O und trans-(CN3H6)(2)[V-6(V)O-13((OCH2)(3)CCH2OH)(2)] · H2O. ZEITSCHRIFT FÜR ANORGANISCHE UND ALLGEMEINE CHEMIE, 621(11), p 1818-1831.
A. Müller, et al., “Cis-/Trans-Isomerie bei Bis-(trisalkoxy)-hexavanadaten - Cis-Na2[V-6(IV)O-7(OH)(6)((OCH2)(3)CCH2OH)(2)) · 8H2O, cis-(CN3H6)3[V-5(IV)O-V(13)((OCH2)(3)CCH2OH)(2)] · 4,5H(2)O und trans-(CN3H6)(2)[V-6(V)O-13((OCH2)(3)CCH2OH)(2)] · H2O”, ZEITSCHRIFT FÜR ANORGANISCHE UND ALLGEMEINE CHEMIE, vol. 621, 1995, pp. 1818-1831.
Müller, A., Meyer, J., Bögge, H., Stammler, A., Botar, A.: Cis-/Trans-Isomerie bei Bis-(trisalkoxy)-hexavanadaten - Cis-Na2[V-6(IV)O-7(OH)(6)((OCH2)(3)CCH2OH)(2)) · 8H2O, cis-(CN3H6)3[V-5(IV)O-V(13)((OCH2)(3)CCH2OH)(2)] · 4,5H(2)O und trans-(CN3H6)(2)[V-6(V)O-13((OCH2)(3)CCH2OH)(2)] · H2O. ZEITSCHRIFT FÜR ANORGANISCHE UND ALLGEMEINE CHEMIE. 621, 1818-1831 (1995).
Müller, Achim, Meyer, Jochen, Bögge, Hartmut, Stammler, Anja, and Botar, Alexandru. “Cis-/Trans-Isomerie bei Bis-(trisalkoxy)-hexavanadaten - Cis-Na2[V-6(IV)O-7(OH)(6)((OCH2)(3)CCH2OH)(2)) · 8H2O, cis-(CN3H6)3[V-5(IV)O-V(13)((OCH2)(3)CCH2OH)(2)] · 4,5H(2)O und trans-(CN3H6)(2)[V-6(V)O-13((OCH2)(3)CCH2OH)(2)] · H2O”. ZEITSCHRIFT FÜR ANORGANISCHE UND ALLGEMEINE CHEMIE 621.11 (1995): 1818-1831.
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