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<title>UTas ePrints - Cyclometallation of polydentate ligands containing pyrazole groups, including the synthesis of platinum(IV) complexes with tripodal [N-C-N]- ligand systems</title>
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<meta content="Canty, A.J." name="eprints.creators_name" />
<meta content="Honeyman, R.T." name="eprints.creators_name" />
<meta content="allan.canty@utas.edu.au" name="eprints.creators_id" />
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<meta content="Cyclometallation of polydentate ligands containing pyrazole
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with tripodal [N-C-N]- ligand systems" name="eprints.title" />
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<meta content="Dimethylplatinum(I1) complexes, PtR2(L), have been made by reaction of [PtR2(mu-SEt2)]2 with a range of polydentate nitrogen donor ligands containing one or more pyrazol-l-y1 (pz) donor groups, including the new ligand bis(pyrazol-1-yl)(thien-2-yl)methane. The complexes give cis-PtMe2(py)2 when dissolved in pyridine at ambient temperature, except for PtMe2(L) (L = (pz)2CH2, (pz)2C(H)Ph, (pz)3CH, or (pz)2(mim)CH (mim = N-methylimidazol-2-yl)), which undergo
cyclometallation at a C(5) position of one pyrazol-l-y1 ring. The cyclometallated ligands have been examined as ‘isoelectronic’ analogues of nitrogen donor poly(pyrazol-1-yl)alkane and poly(pyrazol-l-yl)borate ligands. A carbon monoxide derivative, PtMe{(pz)2(C3H2N2)CH-N,C}(CO) (Id) and a series of phosphine complexes have been prepared. The complex PtMe{(pz)2(C3H2N2)CH-N,C}(py)
(la) and polymeric [PtMe{(pz)2(C3H2N2)CH}]n (2) undergo oxidative addition reactions with organohalides to give the platinum(IV) complexes [fac-PtMe(R){(pz)2(C3H2N2)CH-N,N’,C}(py)]X (7a-d) and fac-PtXMe(R){(pz)2(C3H2N2)CH-N,N’,C} (8a,b), respectively. The new reagent 1-bromo-2-
(pyrazol-1-yl)ethane forms [fac-PtMe{(pz)2(C3H2N2)CH-N,N’,C}(pzCH2CH2-N,C)]Br (lo), containing both [N-C-N]- and [N-C]- ligands. Reaction of Me1 or PhCH2Br with PtMe2{(pz)3CH} gives fac-PtXMe(R){(pz)2(C3H2N2)CH-N,N’,C} (8a,b) directly, and PtMe2{(pz)4C} undergoes a similar cyclometallation/ oxidative addition in iodomethane to form fac-PtIMe2{(pz)2(C3H2N2)CH-N,N’,C} (13)." name="eprints.abstract" />
<meta content="1990" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="Journal of Organometallic Chemistry" name="eprints.publication" />
<meta content="387" name="eprints.volume" />
<meta content="2" name="eprints.number" />
<meta content="247-263" name="eprints.pagerange" />
<meta content="10.1016/0022-328X(90)80028-X" name="eprints.id_number" />
<meta content="TRUE" name="eprints.refereed" />
<meta content="0022-328X" name="eprints.issn" />
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<meta content="Canty, A.J. and Honeyman, R.T. (1990) Cyclometallation of polydentate ligands containing pyrazole groups, including the synthesis of platinum(IV) complexes with tripodal [N-C-N]- ligand systems. Journal of Organometallic Chemistry, 387 (2). pp. 247-263. ISSN 0022-328X" name="eprints.citation" />
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<meta content="Cyclometallation of polydentate ligands containing pyrazole
groups, including the synthesis of platinum(IV) complexes
with tripodal [N-C-N]- ligand systems" name="DC.title" />
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<meta content="Honeyman, R.T." name="DC.creator" />
<meta content="259901 Organometallic Chemistry" name="DC.subject" />
<meta content="Dimethylplatinum(I1) complexes, PtR2(L), have been made by reaction of [PtR2(mu-SEt2)]2 with a range of polydentate nitrogen donor ligands containing one or more pyrazol-l-y1 (pz) donor groups, including the new ligand bis(pyrazol-1-yl)(thien-2-yl)methane. The complexes give cis-PtMe2(py)2 when dissolved in pyridine at ambient temperature, except for PtMe2(L) (L = (pz)2CH2, (pz)2C(H)Ph, (pz)3CH, or (pz)2(mim)CH (mim = N-methylimidazol-2-yl)), which undergo
cyclometallation at a C(5) position of one pyrazol-l-y1 ring. The cyclometallated ligands have been examined as ‘isoelectronic’ analogues of nitrogen donor poly(pyrazol-1-yl)alkane and poly(pyrazol-l-yl)borate ligands. A carbon monoxide derivative, PtMe{(pz)2(C3H2N2)CH-N,C}(CO) (Id) and a series of phosphine complexes have been prepared. The complex PtMe{(pz)2(C3H2N2)CH-N,C}(py)
(la) and polymeric [PtMe{(pz)2(C3H2N2)CH}]n (2) undergo oxidative addition reactions with organohalides to give the platinum(IV) complexes [fac-PtMe(R){(pz)2(C3H2N2)CH-N,N’,C}(py)]X (7a-d) and fac-PtXMe(R){(pz)2(C3H2N2)CH-N,N’,C} (8a,b), respectively. The new reagent 1-bromo-2-
(pyrazol-1-yl)ethane forms [fac-PtMe{(pz)2(C3H2N2)CH-N,N’,C}(pzCH2CH2-N,C)]Br (lo), containing both [N-C-N]- and [N-C]- ligands. Reaction of Me1 or PhCH2Br with PtMe2{(pz)3CH} gives fac-PtXMe(R){(pz)2(C3H2N2)CH-N,N’,C} (8a,b) directly, and PtMe2{(pz)4C} undergoes a similar cyclometallation/ oxidative addition in iodomethane to form fac-PtIMe2{(pz)2(C3H2N2)CH-N,N’,C} (13)." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Cyclometallation of polydentate ligands containing pyrazole groups, including the synthesis of platinum(IV) complexes with tripodal [N-C-N]- ligand systems</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Canty, A.J.</span> and <span class="person_name">Honeyman, R.T.</span> (1990) <xhtml:em>Cyclometallation of polydentate ligands containing pyrazole groups, including the synthesis of platinum(IV) complexes with tripodal [N-C-N]- ligand systems.</xhtml:em> Journal of Organometallic Chemistry, 387 (2). pp. 247-263. ISSN 0022-328X</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/2828/1/JOMC1990_2C_247.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/2828/1/JOMC1990_2C_247.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />1337Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="4037" 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/10.1016/0022-328X(90)80028-X">http://dx.doi.org/10.1016/0022-328X(90)80028-X</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Dimethylplatinum(I1) complexes, PtR2(L), have been made by reaction of [PtR2(mu-SEt2)]2 with a range of polydentate nitrogen donor ligands containing one or more pyrazol-l-y1 (pz) donor groups, including the new ligand bis(pyrazol-1-yl)(thien-2-yl)methane. The complexes give cis-PtMe2(py)2 when dissolved in pyridine at ambient temperature, except for PtMe2(L) (L = (pz)2CH2, (pz)2C(H)Ph, (pz)3CH, or (pz)2(mim)CH (mim = N-methylimidazol-2-yl)), which undergo
cyclometallation at a C(5) position of one pyrazol-l-y1 ring. The cyclometallated ligands have been examined as ‘isoelectronic’ analogues of nitrogen donor poly(pyrazol-1-yl)alkane and poly(pyrazol-l-yl)borate ligands. A carbon monoxide derivative, PtMe{(pz)2(C3H2N2)CH-N,C}(CO) (Id) and a series of phosphine complexes have been prepared. The complex PtMe{(pz)2(C3H2N2)CH-N,C}(py)
(la) and polymeric [PtMe{(pz)2(C3H2N2)CH}]n (2) undergo oxidative addition reactions with organohalides to give the platinum(IV) complexes [fac-PtMe(R){(pz)2(C3H2N2)CH-N,N’,C}(py)]X (7a-d) and fac-PtXMe(R){(pz)2(C3H2N2)CH-N,N’,C} (8a,b), respectively. The new reagent 1-bromo-2-
(pyrazol-1-yl)ethane forms [fac-PtMe{(pz)2(C3H2N2)CH-N,N’,C}(pzCH2CH2-N,C)]Br (lo), containing both [N-C-N]- and [N-C]- ligands. Reaction of Me1 or PhCH2Br with PtMe2{(pz)3CH} gives fac-PtXMe(R){(pz)2(C3H2N2)CH-N,N’,C} (8a,b) directly, and PtMe2{(pz)4C} undergoes a similar cyclometallation/ oxidative addition in iodomethane to form fac-PtIMe2{(pz)2(C3H2N2)CH-N,N’,C} (13).</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">Additional Information:</th><td valign="top" class="ep_row">The definitive version is available at http://www.sciencedirect.com
</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">ID Code:</th><td valign="top" class="ep_row">2828</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">11 Jan 2008 12:02</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">11 Jan 2008 12:02</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=2828;">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=2828">item control page</a></p>
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