Platinum Oxoboryl Complexes as Substrates for the Formation of 1:1, 1:2, and 2:1 Lewis Acid–Base Adducts and 1,2‐Dipolar Additions |
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Authors: | Dr Stefanie Bertsch Johannes Brand Prof?Dr Holger Braunschweig Florian Hupp Krzysztof Radacki |
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Institution: | Institut für Anorganische Chemie, Julius‐Maximilians Universit?t Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www‐anorganik.chemie.uni‐wuerzburg.de/Braunschweig/ |
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Abstract: | The oxoboryl complex trans‐(Cy3P)2BrPt(B?O)] ( 2 ) reacts with the Group 13 Lewis acids EBr3 (E=Al, Ga, In) to form the 1:1 Lewis acid–base adducts trans‐(Cy3P)2BrPt(B?OEBr3)] ( 6 – 8 ). This reactivity can be extended by using two equivalents of the respective Lewis acid EBr3 (E=Al, Ga) to form the 2:1 Lewis acid–base adducts trans‐(Cy3P)2(Br3Al‐Br)Pt(B?OAlBr3)] ( 18 ) and trans‐(Cy3P)2(Br3Ga‐Br)Pt(B?OGaBr3)] ( 15 ). Another reactivity pattern was demonstrated by coordinating two oxoboryl complexes 2 to InBr3, forming the 1:2 Lewis acid–base adduct trans‐{(Cy3P)2BrPt(B?O)}2InBr3] ( 20 ). It was also possible to functionalize the B?O triple bond itself. Trimethylsilylisothiocyanate reacts with 2 in a 1,2‐dipolar addition to form the boryl complex trans‐(Cy3P)2BrPt{B(NCS)(OSiMe3)}] ( 27 ). |
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Keywords: | boron ligands Lewis acids Lewis adducts oxoboryl ligands platinum complexes |
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