TY - JOUR
T1 - Synthesis and characterisation of new acetylide-functionalised oligothiophenes and their dinuclear platinum complexes
AU - Lewis, Jack
AU - Long, Nicholas J.
AU - Raithby, Paul R.
AU - Shields, Gregory P.
AU - Wong, Wai Yeung
AU - Younus, Muhammad
PY - 1997/11/21
Y1 - 1997/11/21
N2 - A series of rigid-rod alkynes with extended π conjugation through oligothiophene linkage units in the backbone, 2,5-bis(trimethylsilylethynyl)thiophene Ia, 2,5-diethynylthiophene Ib, 5,5′-bis(trimethylsilylethynyl)-2,2′-bithiophene IIa, 5,5′-diethynyl-2,2′-bithiophene IIb, 5,5″-bis(trimethylsilylethynyl)-2,2′ : 5′,2″-terthiophene IIIa and 5,5″-diethynyl-2,2′ : 5′,2″-terthiophene IIIb, has been prepared. Treatment of the complex trans-[PtPh(Cl)(PR3)2] (R = Et or Bun) with half an equivalent of the diterminal alkynyl oligothiophene chromophores Ib-IIIb in CH2Cl2-NHPri2, in the presence of CuI, at room temperature, afforded the platinum dimers trans-[(Et3P) 2PhPt-C≡CR′C≡C-PtPh(PEt3)2] (R′ = thiophenediyl 1a, bithiophenediyl 2 or terthiophenediyl 3) and trans-[(Bun3P) 2PhPt-C≡CR′C≡C-PtPh(PBun 3)2] 1b (R′ = thiophenediyl) in good yields. All the new compounds have been characterised by analytical and spectroscopic methods, and the single-crystal structures of IIa, 1a and 2 have been established.
AB - A series of rigid-rod alkynes with extended π conjugation through oligothiophene linkage units in the backbone, 2,5-bis(trimethylsilylethynyl)thiophene Ia, 2,5-diethynylthiophene Ib, 5,5′-bis(trimethylsilylethynyl)-2,2′-bithiophene IIa, 5,5′-diethynyl-2,2′-bithiophene IIb, 5,5″-bis(trimethylsilylethynyl)-2,2′ : 5′,2″-terthiophene IIIa and 5,5″-diethynyl-2,2′ : 5′,2″-terthiophene IIIb, has been prepared. Treatment of the complex trans-[PtPh(Cl)(PR3)2] (R = Et or Bun) with half an equivalent of the diterminal alkynyl oligothiophene chromophores Ib-IIIb in CH2Cl2-NHPri2, in the presence of CuI, at room temperature, afforded the platinum dimers trans-[(Et3P) 2PhPt-C≡CR′C≡C-PtPh(PEt3)2] (R′ = thiophenediyl 1a, bithiophenediyl 2 or terthiophenediyl 3) and trans-[(Bun3P) 2PhPt-C≡CR′C≡C-PtPh(PBun 3)2] 1b (R′ = thiophenediyl) in good yields. All the new compounds have been characterised by analytical and spectroscopic methods, and the single-crystal structures of IIa, 1a and 2 have been established.
UR - http://www.scopus.com/inward/record.url?scp=33748641424&partnerID=8YFLogxK
U2 - 10.1039/a704708h
DO - 10.1039/a704708h
M3 - Article
AN - SCOPUS:33748641424
SN - 0300-9246
SP - 4283
EP - 4288
JO - Journal of the Chemical Society - Dalton Transactions
JF - Journal of the Chemical Society - Dalton Transactions
IS - 22
ER -