TY - JOUR
T1 - Synthesis of new bis(acetylide)-substituted fluorene derivatives and their bimetallic and polymeric complexes
AU - Lewis, Jack
AU - Raithby, Paul R.
AU - WONG, Wai Yeung
N1 - Funding Information:
We acknowledge the Croucher Foundation for a Fellowship (to W.-Y.W.) and the Department of Chemistry, The University of Hong Kong for the X-ray data collection of structure 1a during the leave of absence of W.-Y.W. in Hong Kong. We also thank S. Mang of the Melville Laboratory for Polymer Synthesis for assistance in GPC measurements.
PY - 1998/4/15
Y1 - 1998/4/15
N2 - A new series of bis(acetylide) organic ligands having fluorene or fluorenone moieties in the backbone, 2,7-di(trimethylsilylethynyl)fluorene (1a), 2,7-di(ethynyl)fluorene (1b), 2,7-di(trimethylsilylethynyl)fluoren-9-one (2a) and 2,7-di(ethynyl)fluoren-9-one (2b), has been prepared. Reaction of the diterminal alkynyl fluorene derivatives 1b and 2b with two equivalents of the complex trans-[(Ph)(PEt3)2Pt(Cl)] in CH2Cl2/iPr2NH with catalyic CuI readily affords the diplatinum(II) bis(acetylide) complexes trans-[(Ph)(PEt3)2Pt-CC-R1-CC-Pt(PEt 3)2(Ph)] (R1=2,7-fluorenyl 3) and trans-[(Ph)(PEt3)2Pt-CC-R2-CC-Pt(PEt 3) 2(Ph)] (R2=2,7-fluoren-9-onyl 4) in good yields. Two new rigid-rod organometallic polymers trans-[-Pt(PBun3)2-CC-R1-CC-]∞ (5) and trans-[-Pt(PBun3)2-CC-R2-CC-]∞ (6) have also been prepared in good yields, in a similar manner to their dinuclear complexes 3 and 4, by the CuI-catalysed dehydrohalogenation reaction of trans-[Pt(PBun3)2Cl2] with one equivalent of 1b or 2b, in an amine solvent, at ambient temperature. Both poly-yne polymers (colourless 5, deep red 6) exhibit good solubility in common organic solvents and readily cast into thin films. The organometallic terminal alkyne complexes trans-[Cl(dppm)2M-CC-R2-CCH] (M=Ru 7, Os 8), obtained by treatment of 2b with one equivalent of cis-[M(dppm)2Cl2] (M=Ru, Os), based on a NaPF6/DBU method have been utilised as starting products for access to the homobimetallic trans-[Cl(dppm)2M-CC-R2-CC-M(dppm)2Cl] (M=Ru 9, Os 10) and heterobimetallic trans-[Cl(dppm)2Ru-CC-R2-CC-Os(dppm)2Cl] (11) systems by reaction with a suitable choice of cis-M(dppm)2Cl2 (M=Ru or Os). All the new compounds have been characterised by analytical and spectroscopic methods, and the single-crystal X-ray structure of 1b has been determined.
AB - A new series of bis(acetylide) organic ligands having fluorene or fluorenone moieties in the backbone, 2,7-di(trimethylsilylethynyl)fluorene (1a), 2,7-di(ethynyl)fluorene (1b), 2,7-di(trimethylsilylethynyl)fluoren-9-one (2a) and 2,7-di(ethynyl)fluoren-9-one (2b), has been prepared. Reaction of the diterminal alkynyl fluorene derivatives 1b and 2b with two equivalents of the complex trans-[(Ph)(PEt3)2Pt(Cl)] in CH2Cl2/iPr2NH with catalyic CuI readily affords the diplatinum(II) bis(acetylide) complexes trans-[(Ph)(PEt3)2Pt-CC-R1-CC-Pt(PEt 3)2(Ph)] (R1=2,7-fluorenyl 3) and trans-[(Ph)(PEt3)2Pt-CC-R2-CC-Pt(PEt 3) 2(Ph)] (R2=2,7-fluoren-9-onyl 4) in good yields. Two new rigid-rod organometallic polymers trans-[-Pt(PBun3)2-CC-R1-CC-]∞ (5) and trans-[-Pt(PBun3)2-CC-R2-CC-]∞ (6) have also been prepared in good yields, in a similar manner to their dinuclear complexes 3 and 4, by the CuI-catalysed dehydrohalogenation reaction of trans-[Pt(PBun3)2Cl2] with one equivalent of 1b or 2b, in an amine solvent, at ambient temperature. Both poly-yne polymers (colourless 5, deep red 6) exhibit good solubility in common organic solvents and readily cast into thin films. The organometallic terminal alkyne complexes trans-[Cl(dppm)2M-CC-R2-CCH] (M=Ru 7, Os 8), obtained by treatment of 2b with one equivalent of cis-[M(dppm)2Cl2] (M=Ru, Os), based on a NaPF6/DBU method have been utilised as starting products for access to the homobimetallic trans-[Cl(dppm)2M-CC-R2-CC-M(dppm)2Cl] (M=Ru 9, Os 10) and heterobimetallic trans-[Cl(dppm)2Ru-CC-R2-CC-Os(dppm)2Cl] (11) systems by reaction with a suitable choice of cis-M(dppm)2Cl2 (M=Ru or Os). All the new compounds have been characterised by analytical and spectroscopic methods, and the single-crystal X-ray structure of 1b has been determined.
KW - Acetylide
KW - Fluorenyl ligand
KW - Osmium
KW - Platinum
KW - Ruthenium
UR - http://www.scopus.com/inward/record.url?scp=0000122004&partnerID=8YFLogxK
U2 - 10.1016/S0022-328X(97)00711-0
DO - 10.1016/S0022-328X(97)00711-0
M3 - Journal article
AN - SCOPUS:0000122004
SN - 0022-328X
VL - 556
SP - 219
EP - 228
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 1-2
ER -