Synthesis, structures and properties of platinum(ii) complexes of oligothiophene-functionalized ferrocenylacetylene
Abstract
A series of rigid-rod alkynylferrocenyl precursors with oligothiophene (from C(C4H2S)mBr] 2a–2c, [(η5-C5H5)Fe(η5-C5H4)C
C(C4H2S)mC
CSiMe3] 3a–3c and [(η5-C5H5)Fe(η5-C5H4)C
C(C4H2S)mC
CH] 4a–4c (m
= 1–3), have been prepared in moderate to good yields. The ferrocenylacetylene complexes 4a–4c
can be used to form a range of stable platinum(II) alkynyl and bis(alkynyl) compounds trans-[(η5-C5H5)Fe(η5-C5H4)C
C(C4H2S)mC
CPt(PEt3)2Ph] 5a–5c and trans-[(η5-C5H5)Fe(η5-C5H4)C
C(C4H2S)mC
CPt(PBu3)2C
C(C4H2S)mC
C(η5-C5H4)Fe(η5-C5H5)] 6a–6c (m
= 1–3). All these new compounds have been fully characterized by analytical and spectroscopic methods and the molecular structures of the bithienyl-linked
complexes [(η5-C5H5)Fe(η5-C5H4)C
C(C4H2S)2C
C(η5-C5H4)Fe(η5-C5H5)], 2b, 4b, 5b and 6b have been established by