The oxidative addition of HF at trans‐[Ir(ArF)(η2‐C2H4)(PiPr3)2] (1a: ArF = 4‐C5NF4; 1b: ArF = 2‐C6H3F2) affords the fluorido complexes trans‐[Ir(ArF)(F)(H)(PiPr3)2] (2a: ArF = 4‐C5NF4; 2b: ArF = 2‐C6H3F2). The hydrido fluorido complex 2a is also accessible by means of the reaction of the hydroxido complex trans‐[Ir(4‐C5NF4)(H)(OH)(PiPr3)2] (3a) with Et3N·3HF. Both compounds 2a and 2b react with CO to give the carbonyl complexes trans‐[Ir(4‐C5NF4)(F)(H)(CO)(PiPr3)2] (4a: ArF = 4‐C5NF4; 4b: ArF = 2‐C6H3F2). In the presence of traces of water, a slow reaction of 2a with CO2 yields the hydrogencarbonato complex trans‐[Ir(4‐C5NF4)(H)(κ2‐(O,O)‐O2COH)(PiPr3)2] (5a). Upon using 2a or 2b as fluorinating agent, Ph3SiH could be converted into Ph3SiF and CH3C(O)Cl into CH3C(O)F.
The reaction of [Pd(Me) 2 (tmeda)] (tmeda = N,N,N′,N′-tetramethylethylendiamine) with the phosphine i Pr 2 PCH 2 CH 2 OCH 3 resulted in the formation of the palladium(0) complex [Pd( i Pr 2 PCH 2 CH 2 OCH 3 ) 2 ] (1). Treatment of 1 with pentafluoropyridine at room temperature yielded the C−F activation product trans-[Pd(F)(4-C 5 NF 4 )-( i Pr 2 PCH 2 CH 2 OCH 3 ) 2 ] (2). The triflato and bromo complexes trans-[Pd(OTf)(4-C 5 NF 4 )( i Pr 2 PCH 2 CH 2 OCH 3 ) 2 ] (4) and trans-[Pd(Br)(4-C 5 NF 4 )( i Pr 2 PCH 2 CH 2 OCH 3 ) 2 ] (5) could be prepared on reaction of complex 2 with EtOTf or 3-bromopropene, respectively. Treatment of 2 with Me 3 SiCl or HBpin (HBpin = 4,4,5,5-tetramethyl-1,3,2-dioxaborolane, pinacolborane) effects the formation of trans-[Pd(Cl)(4-C 5 NF 4 )( i Pr 2 PCH 2 CH 2 OCH 3 ) 2 ] (6) and trans-[Pd(H)(4-C 5 NF 4 )-( i Pr 2 PCH 2 CH 2 OCH 3 ) 2 ] (7). In catalytic experiments pentafluoropyridine could be converted into the 4-aryl-tetrafluoropyridines (8, aryl = Ph; 9, aryl = Tol) and into 2,3,5,6-tetrafluoropyridine in the presence of the boronic acids PhB(OH) 2 , TolB(OH) 2 , or HBpin when 5 mol % of 2 is employed as catalyst.
Reactions of platinum(0) tolane complexes, bearing a chelating ligand with P and N donor atoms, with the electrophilic fluorinating agent XeF give facile access to platinum(II) β-fluorovinyl fluorido complexes. A series of new platinum(II) β-fluorovinyl complexes have been synthesized and were structurally characterized. Further oxidation with XeF led to ortho-metalated platinum(IV) fluorido compounds. Additional reactions of platinum(0) tolane complexes, bearing a chelating P,P donor ligand, with XeF led to a variety of fluorido and fluorovinyl complexes.
A reaction of trans-[Ir(4-C(5)NF(4))(η(2)-C(2)H(4))(PiPr(3))(2)] (1) with an excess of water in THF at room temperature affords the hydrido hydroxo complex trans-[Ir(4-C(5)NF(4))(H)(OH)(PiPr(3))(2)] (2). Treatment of 2 with CO furnishes trans-[Ir(4-C(5)NF(4))(H)(OH)(CO)(PiPr(3))(2)] (3). Reductive elimination of water from 3 leads to the formation of the iridium(I) carbonyl complex trans-[Ir(4-C(5)NF(4))(CO)(PiPr(3))(2)] (4). The insertion of CO(2) into the Ir-O bond of 2 forms the hydrido hydrogencarbonato complex trans-[Ir(4-C(5)NF(4))(H)(κ(2)-(O,O)-O(2)COH)(PiPr(3))(2)] (5). Treatment of 2 with NH(3) in C(6)D(6) yields trans-[Ir(4-C(5)NF(4))(H)(OH)(NH(3))(PiPr(3))(2)] (6). Storage of the reaction mixture at room temperature reveals the formation of the N-H activation product [Ir(4-C(5)NF(4))(H)(μ-NH(2))(NH(3))(PiPr(3))](2) (7).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.