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<meta content="Canty, A.J." name="eprints.creators_name" />
<meta content="Hoare, J.L." name="eprints.creators_name" />
<meta content="Davies, N.W." name="eprints.creators_name" />
<meta content="Traill, P.R." name="eprints.creators_name" />
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<meta content="Synthesis and Decomposition Behavior of Pallada(IV)cyclopentane Complexes" name="eprints.title" />
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<meta content="The octahedral pallada(IV)cyclopentane complexes PdX(C4H8)R(bpy) [RX = MeI (1), EtI (2), PhCH2Br (3), CH2=CHCH2Br (4); bpy = 2,2'-bipyridine] may be isolated on oxidative
addition of organohalides to the palladium(II) complex Pd(C4H8)(bpy) in acetone at -20 °C. The complex PdBr(C4H8)(CF3)(bpy) (5) has been generated in solution but was too unstable to permit isolation as a solid. Complex 1 occurs as a mixture of isomers in a 4:1 ratio, where the dominant isomer has the methyl group trans to bpy and the minor isomer has 2-fold symmetry with the methyl group trans to the iodo ligand. Complexes 2-5 adopt only the configuration with R trans to X. The complexes exhibit low stability, allowing studies of decomposition in solution under mild conditions in CDCl3 or CD2Cl2. Formation of the major products from PdI(C4H8)Me(bpy) (1) and PdI(C4H8)Et(bpy) (2) is assumed to result from C4H8...R coupling at Pd(IV) to give undetected Pd(II)ICH2CH2CH2CH2R species which undergo alpha-elimination to form alkenes (48% of detected organic products), Pd(0), and HX, with subsequent protonation of Pd(II)CH2CH2CH2CH2R to give alkanes (39%). Complexes 1 and 2 also give iodopentane (~12% from 1) and iodohexane (~9% from 2). The complex PdBr(C4H8)(CH2Ph)(bpy) (3) gives phenylpentane (15%), phenylpentenes (66%), toluene (10%), and butenes (8%); PdBr(C4H8)(CH2CH=CH2)(bpy) (4) and PdI(C4H8)(CF3)(bpy) (5) give
predominantly cyclobutane, together with minor amounts of butenes (4, 5) and propene (4). Deuteration studies implicate the occurrence of intermolecular hydrogen atom transfer for elimination of alkenes and alkanes, except for cyclobutane." name="eprints.abstract" />
<meta content="1998" name="eprints.date" />
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<meta content="Organometallics" name="eprints.publication" />
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<meta content="10" name="eprints.number" />
<meta content="2046-2051" name="eprints.pagerange" />
<meta content="10.1021/om980005t" name="eprints.id_number" />
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<meta content="The octahedral pallada(IV)cyclopentane complexes PdX(C4H8)R(bpy) [RX = MeI (1), EtI (2), PhCH2Br (3), CH2=CHCH2Br (4); bpy = 2,2'-bipyridine] may be isolated on oxidative
addition of organohalides to the palladium(II) complex Pd(C4H8)(bpy) in acetone at -20 °C. The complex PdBr(C4H8)(CF3)(bpy) (5) has been generated in solution but was too unstable to permit isolation as a solid. Complex 1 occurs as a mixture of isomers in a 4:1 ratio, where the dominant isomer has the methyl group trans to bpy and the minor isomer has 2-fold symmetry with the methyl group trans to the iodo ligand. Complexes 2-5 adopt only the configuration with R trans to X. The complexes exhibit low stability, allowing studies of decomposition in solution under mild conditions in CDCl3 or CD2Cl2. Formation of the major products from PdI(C4H8)Me(bpy) (1) and PdI(C4H8)Et(bpy) (2) is assumed to result from C4H8...R coupling at Pd(IV) to give undetected Pd(II)ICH2CH2CH2CH2R species which undergo alpha-elimination to form alkenes (48% of detected organic products), Pd(0), and HX, with subsequent protonation of Pd(II)CH2CH2CH2CH2R to give alkanes (39%). Complexes 1 and 2 also give iodopentane (~12% from 1) and iodohexane (~9% from 2). The complex PdBr(C4H8)(CH2Ph)(bpy) (3) gives phenylpentane (15%), phenylpentenes (66%), toluene (10%), and butenes (8%); PdBr(C4H8)(CH2CH=CH2)(bpy) (4) and PdI(C4H8)(CF3)(bpy) (5) give
predominantly cyclobutane, together with minor amounts of butenes (4, 5) and propene (4). Deuteration studies implicate the occurrence of intermolecular hydrogen atom transfer for elimination of alkenes and alkanes, except for cyclobutane." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Synthesis and Decomposition Behavior of Pallada(IV)cyclopentane Complexes</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Canty, A.J.</span> and <span class="person_name">Hoare, J.L.</span> and <span class="person_name">Davies, N.W.</span> and <span class="person_name">Traill, P.R.</span> (1998) <xhtml:em>Synthesis and Decomposition Behavior of Pallada(IV)cyclopentane Complexes.</xhtml:em> Organometallics, 17 (10). pp. 2046-2051. ISSN 0276-7333</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/2883/1/Organomet1998_2C_2046.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/2883/1/Organomet1998_2C_2046.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />79Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="4145" name="docid" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1021/om980005t">http://dx.doi.org/10.1021/om980005t</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">The octahedral pallada(IV)cyclopentane complexes PdX(C4H8)R(bpy) [RX = MeI (1), EtI (2), PhCH2Br (3), CH2=CHCH2Br (4); bpy = 2,2'-bipyridine] may be isolated on oxidative
addition of organohalides to the palladium(II) complex Pd(C4H8)(bpy) in acetone at -20 °C. The complex PdBr(C4H8)(CF3)(bpy) (5) has been generated in solution but was too unstable to permit isolation as a solid. Complex 1 occurs as a mixture of isomers in a 4:1 ratio, where the dominant isomer has the methyl group trans to bpy and the minor isomer has 2-fold symmetry with the methyl group trans to the iodo ligand. Complexes 2-5 adopt only the configuration with R trans to X. The complexes exhibit low stability, allowing studies of decomposition in solution under mild conditions in CDCl3 or CD2Cl2. Formation of the major products from PdI(C4H8)Me(bpy) (1) and PdI(C4H8)Et(bpy) (2) is assumed to result from C4H8...R coupling at Pd(IV) to give undetected Pd(II)ICH2CH2CH2CH2R species which undergo alpha-elimination to form alkenes (48% of detected organic products), Pd(0), and HX, with subsequent protonation of Pd(II)CH2CH2CH2CH2R to give alkanes (39%). Complexes 1 and 2 also give iodopentane (~12% from 1) and iodohexane (~9% from 2). The complex PdBr(C4H8)(CH2Ph)(bpy) (3) gives phenylpentane (15%), phenylpentenes (66%), toluene (10%), and butenes (8%); PdBr(C4H8)(CH2CH=CH2)(bpy) (4) and PdI(C4H8)(CF3)(bpy) (5) give
predominantly cyclobutane, together with minor amounts of butenes (4, 5) and propene (4). Deuteration studies implicate the occurrence of intermolecular hydrogen atom transfer for elimination of alkenes and alkanes, except for cyclobutane.</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/259901.html">250000 Chemical Sciences > 259900 Other Chemical Sciences > 259901 Organometallic Chemistry</a></td></tr><tr><th valign="top" class="ep_row">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">2883</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Prof Allan J Canty</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">17 Jan 2008 09:05</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">17 Jan 2008 09:05</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=2883;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=2883">item control page</a></p>
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