Thermal Dehydrogenation of Dimethylamine Borane Catalyzed by a Bifunctional Rhenium Complex

Veeranna Yempally, Salvador Moncho Escriva, Yanyan Wang, Samuel J. Kyran, Wai Yip Fan, Edward Brothers, Donald J. Darensbourg, Ashfaq A. Bengali

Research output: Contribution to journalArticle

Abstract

The reaction of a bidentate pyrrole based rhenium tetracarbonyl complex with dimethylamine borane at room temperature results in rapid dehydrogenation. Hydrogen generation was detected at temperatures as low as 238 K, and NMR spectroscopy provided evidence for the initial formation of a Re-H-B σ bound adduct at these temperatures. The rate of the dehydrocoupling reaction was significantly influenced by the electron density on the metal center and the identity of the alkyl group (CH3 or CF3) on the ketone carbon of the pyrrole ligand. The bifunctional nature of this complex incorporating both an acidic Re center and a basic oxygen center, coupled with the hemilability of the organic carbonyl group, are key motifs of this catalyst that result in the thermal dehydrogenation of dimethylamine borane.

Original languageEnglish
JournalOrganometallics
DOIs
Publication statusPublished - 1 Jan 2019

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Boranes
Rhenium
boranes
rhenium
Dehydrogenation
dehydrogenation
Pyrroles
pyrroles
Ketones
ketones
Temperature
Nuclear magnetic resonance spectroscopy
adducts
Carrier concentration
Hydrogen
Carbon
Metals
Oxygen
Ligands
catalysts

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

Cite this

Thermal Dehydrogenation of Dimethylamine Borane Catalyzed by a Bifunctional Rhenium Complex. / Yempally, Veeranna; Moncho Escriva, Salvador; Wang, Yanyan; Kyran, Samuel J.; Fan, Wai Yip; Brothers, Edward; Darensbourg, Donald J.; Bengali, Ashfaq A.

In: Organometallics, 01.01.2019.

Research output: Contribution to journalArticle

Yempally, Veeranna ; Moncho Escriva, Salvador ; Wang, Yanyan ; Kyran, Samuel J. ; Fan, Wai Yip ; Brothers, Edward ; Darensbourg, Donald J. ; Bengali, Ashfaq A. / Thermal Dehydrogenation of Dimethylamine Borane Catalyzed by a Bifunctional Rhenium Complex. In: Organometallics. 2019.
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AU - Wang, Yanyan

AU - Kyran, Samuel J.

AU - Fan, Wai Yip

AU - Brothers, Edward

AU - Darensbourg, Donald J.

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