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- W2317022002 abstract "A rhodium(II) complex of a diarylamido/bis(phosphine) PNP pincer ligand, (PNP)Rh(OTf) (2, where OTf = O3SCF3 and PNP = [κ3-P,N,P-(4-Me-2-(iPr2P)-C6H3)2N]), has been prepared by oxidation of the rhodium(I) precursor (PNP)Rh(H2C═CHBut) (1) with AgOTf. A series of related rhodium(II) complexes of the general formula (PNP)Rh(X) (where X = OAc (3), OSiPh3 (4), OC6H4F (5), Cl (6)) was synthesized via simple anion metathesis reactions starting from 2. In addition, complexes 3 and 6 could be prepared by hydrogen atom abstraction from (PNP)Rh(H)(OAc) (7) or (PNP)Rh(H)(Cl) (8) with TEMPO ((2,2,6,6-tetramethylpiperidin-1-yl)oxyl). Solid-state X-ray structures of compounds 2–6 revealed an approximately square-planar environment about Rh. Analysis of the structural features of 2–6, EPR spectroscopic data, and DFT computational studies are most consistent with a +2 oxidation state for rhodium. Reactions of 2, 3, 5, and 6 with H2 were explored. The reaction of 2 with H2 gave the new complex (PN(H)P)Rh(H)2(OTf) (9), and the reaction of 3 with H2 produced (PNP)Rh(H)(OAc) (7), whereas the reaction of 5 with H2 gave the known (PNP)Rh(H2) (10), all with complete consumption of the starting rhodium(II) complexes. In contrast, the reaction of 6 with H2 produced a mixture of (PNP)Rh(H)(Cl) (8) and (PN(H)P)Rh(H)2(Cl) (11) in apparent equilibrium with 6 and H2. (PNP)Rh(H2) (10) was identified as an elongated dihydrogen complex." @default.
- W2317022002 created "2016-06-24" @default.
- W2317022002 creator A5000267323 @default.
- W2317022002 creator A5015487436 @default.
- W2317022002 creator A5029906433 @default.
- W2317022002 creator A5065155851 @default.
- W2317022002 date "2013-03-21" @default.
- W2317022002 modified "2023-10-17" @default.
- W2317022002 title "Monomeric Rhodium(II) Complexes Supported by a Diarylamido/Bis(phosphine) PNP Pincer Ligand and Their Reactivity Toward Dihydrogen" @default.
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- W2317022002 doi "https://doi.org/10.1021/om300760j" @default.
- W2317022002 hasPublicationYear "2013" @default.
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