The synthesis of cationic mono oxo Mo PNP pincer complexes of the type [Mo(PNP-Pr)(O)X] (X = I, Br) from [Mo(PNP-Pr)(CO)X] is described. These compounds are coordinatively unsaturated and feature a strong Mo≡O triple bond. The formation of these complexes proceeds via cationic 14e intermediates [Mo(PNP-Pr)(CO)X] and requires both molecular oxygen and water. ESI MS measurements with O labeled water (H O) and molecular oxygen (O) indicates that water plays a crucial role in the formation of the Mo≡O bond. A plausible mechanism based on DFT calculations is provided. The X-ray structure of [Mo(PNP-Pr)(O)I]SbF is presented.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6485545 | PMC |
| http://dx.doi.org/10.1002/ejic.201701413 | DOI Listing |
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