期刊
DALTON TRANSACTIONS
卷 49, 期 4, 页码 1011-1021出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9dt04521j
关键词
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资金
- Czech Science Foundation [17-02495S]
- Charles University Research Centre program [UNCE/SCI/014]
While numerous functional ligands combining phosphine and imidazole-2-ylidene (or imidazolin-2-ylidene) donor moieties have already been reported, the chemistry of the corresponding functional mesoionic carbenes (MIC) derived from 1,2,3-triazoles remains nearly untapped. This contribution describes the synthesis of two isomeric series of triazolium salts bearing 1'-(diphenylphosphino)ferrocenyl substituents by [3 + 2] cycloaddition of a P-protected phosphinoferrocene alkyne with azides, or alternatively of a P-protected phosphinoferrocene azide with terminal alkynes, and by subsequent methylation. These salts were used to synthesize structurally unique Pd(II) complexes featuring a P,C-chelating triazolylidene carbene ligands and Au(I)-MIC complexes with free phosphine groups. The latter were further utilised to prepare Pd(II)Au(I) heterometallic complexes containing bridging ferrocene phosphino-carbenes as structurally flexible, donor-unsymmetric metalloligands. In addition, the reactivity of the newly prepared, P-protected phosphinoferrocene alkyne Ph(2)PfcCuCH center dot BH3 (fc = ferrocene-1,1'-diyl) was investigated, and representatives from all reported compound classes were structurally characterised.
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