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2 article(s) from Wadepohl, Hubert

Molecular weight control in organochromium olefin polymerization catalysis by hemilabile ligand–metal interactions

Stefan Mark,
Hubert Wadepohl and
Markus Enders

Beilstein J. Org. Chem. 2016, 12, 1372–1379, doi:10.3762/bjoc.12.131

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Scheme 1: Influencing catalyst stability, olefin coordination and chain-transfer reactions by hemilabile dono...

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Scheme 2: Synthesis of ligands L1–L8 and chromium complexes 1–8.

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Figure 1: Solid-state molecular structures of selected complexes 4, 7 and 8 (left, middle and right, respecti...

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Figure 2: a) Calculated structures of cationic chromium complexes. Chromium–donor distances [Å]: 3a⁺ [2.21], ...

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Figure 3: Comparison of GPC traces of polyethylene produced by 1/PMAO and 8/PMAO respectively (entries 1 and ...

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Published 04 Jul 2016

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A modular approach to neutral P,N-ligands: synthesis and coordination chemistry

Vladislav Vasilenko,
Torsten Roth,
Clemens K. Blasius,
Sebastian N. Intorp,
Hubert Wadepohl and
Lutz H. Gade

Beilstein J. Org. Chem. 2016, 12, 846–853, doi:10.3762/bjoc.12.83

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Figure 1: P,N-ligand frameworks studied in this work.

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Scheme 1: Synthesis of N-phosphanylformamidines 2 and 3. Reaction conditions: (i) t-BuLi, THF, −78 °C to rt, ...

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Scheme 2: Synthesis of phosphanylformamidines 5 and 7. Reaction conditions: (i) t-BuLi, THF, −78 °C to rt, 1 ...

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Scheme 3: Synthesis of complexes [2-M(cod)]X, [3-M(cod)]X, [5-M(cod)]X and [7-M(cod)]X. M = Rh, Ir; X = BF₄⁻ ...

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Figure 2: Molecular structures of [2a-Rh(cod)]⁺ (A), [5-Ir(cod)]⁺ (B), and [7-Rh(cod)]⁺ (C,D). Anisotropic di...

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Figure 3: Coordination of ligands 2a and 5 to Rh(III) and Ir(III) precursors. Yields: [2a-Cp*RhCl]BF₄ = 87%, [...

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Figure 4: Molecular structures of [2a-Cp*IrI]⁺ (left) and [5-Cp*IrI]⁺ (right). Anisotropic displacement ellip...

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Figure 5: Formation of palladium complexes of ligands 2a, 5 and 7. (A) Formation of [2a-PdCl₂] and [2a-PdCl]₂...

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Figure 6: Molecular structures of [2a-PdCl₂] (left) and [5-Pd(2-Me-allyl)]⁺ (right). Anisotropic displacement...

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Published 29 Apr 2016

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