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Abstract

We report the synthesis of molybdenum and tungsten bromo dicarbonyl complexes (POCOP ^t ^Bu)M^IIBr(CO)₂ (M = Mo or W; POCOP ^t ^Bu = κ³-C₆H₃-1,3-[OP(tBu)₂]₂) supported by an anionic PCP pincer ligand, and the chromium complex (PNP ^t ^Bu)Cr⁰(CO)₃ (PNP ^t ^Bu = 2,6-bis(di-tert-butyl-phosphinomethyl)pyridine) bearing a neutral PNP pincer scaffold. The three group six complexes described in this study have been characterized by Liquid Injection Field Desorption Ionization Mass Spectrometry (LIFDI-MS), NMR, and IR spectroscopy. Single crystal X-ray diffraction studies show the Mo^II and W^II complexes adopt a six-coordinate distorted trigonal prismatic geometry, whereas the Cr⁰ complex exhibits a distorted octahedral geometry.

Keywords

LIFDI group 6 molybdenum chromium tungsten pincer ligands

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