Reactivity of (Triphos)FeBr2(CO) towards sodium borohydrides

Tufan K. Mukhopadhyay; Thomas L. Groy; Nathan C. Smythe; John C. Gordon; Ryan Trovitch

doi:10.1080/00958972.2016.1191631

Reactivity of (Triphos)FeBr₂(CO) towards sodium borohydrides

Tufan K. Mukhopadhyay, Thomas L. Groy, Nathan C. Smythe, John C. Gordon, Ryan Trovitch

Molecular Sciences, School of (SMS)

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The addition of CO to (Triphos)FeBr₂ (Triphos = PhP(CH₂CH₂PPh₂)₂) resulted in formation of six-coordinate (Triphos)FeBr₂(CO). This coordination compound was found to have cis-bromide ligands and a mer-Triphos ligand by single crystal X-ray diffraction. Once characterized, the reactivity of this compound toward NaEt₃BH and NaBH₄ was investigated. Adding 1 eq. of NaEt₃BH to (Triphos)FeBr₂(CO) resulted in formation of (Triphos)FeH(Br)(CO), while the addition of 2.2 eq. afforded previously described (Triphos)Fe(CO)₂. In contrast, adding 2.2 eq. of NaBH₄ to (Triphos)FeBr₂(CO) resulted in carbonyl dissociation and formation of diamagnetic (Triphos)FeH(η²-BH₄), which has been structurally characterized. Notably, efforts to prepare (Triphos)FeH(η²-BH₄) following 2.2 eq. NaBH₄ addition to (Triphos)FeBr₂ were unsuccessful. The importance of these observations as they relate to previously reported (Triphos)Fe reactivity and recent developments in Fe catalysis are discussed.

Original language	English (US)
Pages (from-to)	2038-2046
Number of pages	9
Journal	Journal of Coordination Chemistry
Volume	69
Issue number	11-13
DOIs	https://doi.org/10.1080/00958972.2016.1191631
State	Published - Jul 2 2016

Keywords

Borane ligands
Coordination compounds
Hydrides
Iron
Triphos

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Materials Chemistry

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10.1080/00958972.2016.1191631

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title = "Reactivity of (Triphos)FeBr2(CO) towards sodium borohydrides",

abstract = "The addition of CO to (Triphos)FeBr2 (Triphos = PhP(CH2CH2PPh2)2) resulted in formation of six-coordinate (Triphos)FeBr2(CO). This coordination compound was found to have cis-bromide ligands and a mer-Triphos ligand by single crystal X-ray diffraction. Once characterized, the reactivity of this compound toward NaEt3BH and NaBH4 was investigated. Adding 1 eq. of NaEt3BH to (Triphos)FeBr2(CO) resulted in formation of (Triphos)FeH(Br)(CO), while the addition of 2.2 eq. afforded previously described (Triphos)Fe(CO)2. In contrast, adding 2.2 eq. of NaBH4 to (Triphos)FeBr2(CO) resulted in carbonyl dissociation and formation of diamagnetic (Triphos)FeH(η2-BH4), which has been structurally characterized. Notably, efforts to prepare (Triphos)FeH(η2-BH4) following 2.2 eq. NaBH4 addition to (Triphos)FeBr2 were unsuccessful. The importance of these observations as they relate to previously reported (Triphos)Fe reactivity and recent developments in Fe catalysis are discussed.",

keywords = "Borane ligands, Coordination compounds, Hydrides, Iron, Triphos",

author = "Mukhopadhyay, {Tufan K.} and Groy, {Thomas L.} and Smythe, {Nathan C.} and Gordon, {John C.} and Ryan Trovitch",

note = "Publisher Copyright: {\textcopyright} 2016 Informa UK Limited, trading as Taylor & Francis Group.",

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T1 - Reactivity of (Triphos)FeBr2(CO) towards sodium borohydrides

AU - Mukhopadhyay, Tufan K.

AU - Groy, Thomas L.

AU - Smythe, Nathan C.

AU - Gordon, John C.

AU - Trovitch, Ryan

PY - 2016/7/2

Y1 - 2016/7/2

N2 - The addition of CO to (Triphos)FeBr2 (Triphos = PhP(CH2CH2PPh2)2) resulted in formation of six-coordinate (Triphos)FeBr2(CO). This coordination compound was found to have cis-bromide ligands and a mer-Triphos ligand by single crystal X-ray diffraction. Once characterized, the reactivity of this compound toward NaEt3BH and NaBH4 was investigated. Adding 1 eq. of NaEt3BH to (Triphos)FeBr2(CO) resulted in formation of (Triphos)FeH(Br)(CO), while the addition of 2.2 eq. afforded previously described (Triphos)Fe(CO)2. In contrast, adding 2.2 eq. of NaBH4 to (Triphos)FeBr2(CO) resulted in carbonyl dissociation and formation of diamagnetic (Triphos)FeH(η2-BH4), which has been structurally characterized. Notably, efforts to prepare (Triphos)FeH(η2-BH4) following 2.2 eq. NaBH4 addition to (Triphos)FeBr2 were unsuccessful. The importance of these observations as they relate to previously reported (Triphos)Fe reactivity and recent developments in Fe catalysis are discussed.

AB - The addition of CO to (Triphos)FeBr2 (Triphos = PhP(CH2CH2PPh2)2) resulted in formation of six-coordinate (Triphos)FeBr2(CO). This coordination compound was found to have cis-bromide ligands and a mer-Triphos ligand by single crystal X-ray diffraction. Once characterized, the reactivity of this compound toward NaEt3BH and NaBH4 was investigated. Adding 1 eq. of NaEt3BH to (Triphos)FeBr2(CO) resulted in formation of (Triphos)FeH(Br)(CO), while the addition of 2.2 eq. afforded previously described (Triphos)Fe(CO)2. In contrast, adding 2.2 eq. of NaBH4 to (Triphos)FeBr2(CO) resulted in carbonyl dissociation and formation of diamagnetic (Triphos)FeH(η2-BH4), which has been structurally characterized. Notably, efforts to prepare (Triphos)FeH(η2-BH4) following 2.2 eq. NaBH4 addition to (Triphos)FeBr2 were unsuccessful. The importance of these observations as they relate to previously reported (Triphos)Fe reactivity and recent developments in Fe catalysis are discussed.

KW - Borane ligands

KW - Coordination compounds

KW - Hydrides

KW - Iron

KW - Triphos

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Reactivity of (Triphos)FeBr₂(CO) towards sodium borohydrides

Abstract

Keywords

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