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Isolable Diaminophosphide Boranes.

ABSTRACT: Metalation of secondary diaminophosphine boranes by alkali metal amides provides a robust and selective access route to a range of metal diaminophosphide boranes M[(R₂ N)₂ P(BH₃ )] (M=Li, Na, K; R=alkyl, aryl) with acyclic or heterocyclic molecular backbones, whereas reduction of a chlorodiaminophosphine borane gave less satisfactory results. The metalated species were characterized in situ by NMR spectroscopy and in two cases isolated as crystalline solids. Single-crystal XRD studies revealed the presence of salt-like structures with strongly interacting ions. Synthetic applications of K[(R₂ N)₂ P(BH₃ )] were studied in reactions with a 1,2-dichlorodisilane and CS₂ , which afforded either mono- or difunctional phosphine boranes with a rare combination of electronegative amino and electropositive functional disilanyl groups on phosphorus, or a phosphinodithioformate. Spectroscopic studies gave a first hint that removal of the borane fragment may be feasible.

SUBMITTER: Blum M

PROVIDER: S-EPMC7756230 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Isolable Diaminophosphide Boranes.

Blum Markus M Dunaj Tobias T Knöller Julius A JA Feil Christoph M CM Nieger Martin M Gudat Dietrich D

Chemistry (Weinheim an der Bergstrasse, Germany) 20201019 66

Metalation of secondary diaminophosphine boranes by alkali metal amides provides a robust and selective access route to a range of metal diaminophosphide boranes M[(R2 N)2 P(BH3 )] (M=Li, Na, K; R=alkyl, aryl) with acyclic or heterocyclic molecular backbones, whereas reduction of a chlorodiaminophosphine borane gave less satisfactory results. The metalated species were characterized in situ by NMR spectroscopy and in two cases isolated as crystalline solids. Sing ...[more]

PMID: 32567741

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