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• W2071304548 abstract "A series of complexes of type cis-[PtCl2(PR3)Q](PR3= PMe3, PEt3, PPrn3, or PMe2Ph; Q = prop-2-en-1-ol, but-1-en-3-ol, or 3-methylbut-1-en-3-ol) have been prepared. The crystal structure of cis-[PtCl2(PMe2Ph)-(CH2CHCH2OH)] is described : no intramolecular hydrogen bond is present. Crystal data : space group P21/n, a= 12.540(3), b= 10.668(7), c= 10.929(2)Å, β= 97.02(2)°, and Z= 4. The complexes cis-[PtCl2(PR3)Q] have been studied by variable-temperature 1H and 31P n.m.r. spectroscopy. There is no evidence for rotamers, as found with other olefin complexes. At room temperature slow dissociation to give the bridged complex [Pt2Cl4-(PR3)2] and the free allyl alcohol occurs. The complex cis-[PtCl2(PMe2Ph)(CH2CHCH2OH)] does not exchange rapidly with free allyl alcohol and separate resonances due to free and complexed allyl alcohol could be observed : in contrast [NBun4][PtCl3(CH2CHCH2OH)] exchanges rapidly with free allyl alcohol on the n.m.r. time scale. N.m.r. studies of the interaction between chloro-bridged complexes of the type [Pt2Cl4(PR3)2]{and also [Pt2Br4(PMe2Ph)2]} and allylic alcohols show that at low temperatures the bridged species is rapidly and reversibly converted into trans-[PtCl2(PR3)(CH2CHCR1R2OH)] together with some of the O-bonded species, trans[[graphic omitted]H)]. Above ca. 260 K the resonances start to broaden due to exchange with the bridged complex and have also become much less intense due to reversion back to the bridged complex: cis-[PtCl2(PR3)(CH2CHCR1R2OH)] is also gradually formed above ca. 260 K. A [Pt2Br4(PMe2Ph)2]–CH2CHCH2OH system also shows the presence of trans-[PtBr2(PMe2Ph)(CH2CHCH2OH)] and in this case the cis isomer forms to a detectable extent even at 213 K. The bridged complex [Pt2Cl4(PPrnBut2)2] containing the bulky phosphine shows the presence of rotamers at 243 K and with allyl alcohol two rotamers trans-[PtCl2(PPrnBut2)(CH2CHCH2OH)] form at 213 K. The 1H and 31P n.m.r. and i.r. data are given and discussed." @default.
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• W2071304548 date "1980-01-01" @default.
• W2071304548 modified "2023-09-23" @default.
• W2071304548 title "Interaction of allylic alcohols with halogeno-bridged platinum(<scp>II</scp>) complexes [Pt₂X₄(PR₃)₂](X = Cl or Br) and [NBuⁿ₄]₂[Pt₂Cl₆] : crystal structure of [PtCl₂(PMe₂Ph)(CH₂CHCH₂OH)]" @default.
• W2071304548 doi "https://doi.org/10.1039/dt9800000064" @default.
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