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    <title>UTas ePrints - Coordination Chemistry of Methylmercury(II). Complexes of Aromatic Nitrogen DonorTripod Ligands Involving New Coordination Geometries for MeHg(II)</title>
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    <meta content="Canty, A.J." name="eprints.creators_name" />
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<meta content="Coordination Chemistry of Methylmercury(II). Complexes of Aromatic Nitrogen DonorTripod Ligands Involving New Coordination Geometries for MeHg(II)" name="eprints.title" />
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<meta content="Complexes [MeHgL]N03 {L = diphenyl(2-pyridy1)methane (pyCHPh2), bis(2-pyridy1)phenylmethane [(py)2CHPh], and the tripod ligands tris(2-pyridy1)carbinol [(py)3COH] and bis(2-pyridyl)(N-methyl-2-imidazolyl)carbinol [(py)2(NMeIm)COH]} are obtained from addition reactions in acetone. The ligand (py)2CHPh is formed on reaction of (2-benzylpyridy1)lithium with 2-bromopyridine. 1H NMR spectra indicate that (py)2CHPh and (py)2(N-Me1m)COH are present as bidentates in methanol solutions of their complexes, with the latter coordinated via the imidazolyl ring and one pyridyl ring. Spectra are consistent with the presence of weak pi interactions between mercury and phenyl rings in the
(py)CHPh2 and (py)2CHPh complexes and the uncoordinated pyridyl ring in the (py)2(N-Me1m)COH complex. In complexes
[MeHgL]N03 (L = (py)3OH, (py)3CH) the ligands are present as tridentates in methanol. Crystalline [MeHgL]NO3
[L = (py)3OH, (py)2(N-MeIm)COH] have the tripod ligands coordinating as tridentates, with irregular coordination
geometries based on a dominant C-Hg-N’ moiety [Hg-N’ = 2.28 (1) A, C-Hg-N’ = 150(1)O ((py)3COH) and 2.13(1) A, 170(0) ((py)2(N-MeIm)COH)] with weaker Hg-N,N” bonds [2.45(l), 2.53(1) ((py)3OH) and 2.66(l), 2.71(1) A ((py)2(N-MeIm)COH)]. For [MeHg((py)2(N-MeIm)COH)] the coordination geometry resembles a trigonal bipyramid lacking one equatorial donor and with axial direction C-Hg-N’." name="eprints.abstract" />
<meta content="1981" name="eprints.date" />
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<meta content="Inorganic Chemistry" name="eprints.publication" />
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Monash University.
D. L. Rabenstein, Acc. Chem. Res., 11, 100 (1978).
A. J. Canty and A. Marker, Inorg. Chem., 15, 425 (1976).
A. J. Canty and B. M. Gatehouse J. Chem. SOC.D, alton Trans., 2018
(1976).
A. J. Canty, G. Hayhurst, N. Chaichit, and B. M. Gatehouse, J. Chem.
Soc., Chem. Commun., 316 (1980).
A. J. Canty, N. Chaichit, B. M. Gatehouse, E. E. George, and G.
Hayhurst, Inorg. Chem., 20, 2414 (1981).

(8) A. J. Canty, C. V. Lee, N. Chaichit, and B. M. Gatehouse, Acra
Crystallogr., in press.

(9) A. J. Canty, P. Barron, and P. C. Healy, J. Orgonomet. Chem., 179,
447 (1979).
(10) A. J. Canty and R. S. Tobias, Inorg. Chem., 18, 413 (1979).
(1 1) J. P. Wibaut, A. P. De Jonge, H. G. P. Van Der Vwrt, and P. Ph. H.
L. Otto, Red. Trau. Chim. Pays-Bas, 70, 1054 (1951).
(12) R. S. Brown and J. Huguet, Can. J. Chem., 58, 889 (1980).
(13) B. M. Gatehouse and B. K. Miskin, Acta Crystallogr., Sect. E, B30,
1311 (1974).

14) J. Hornstra and B. Stubbe, PW 1100 Data Processing Program, Philip
Research Laboratories, Eindhoven, Holland.

(15) D. T. Cromer and J. B. Mann, Acta Crystallogr., Sect. A, A24, 321
(1968).
(16) D. T. Cromer and D. Liberman, J. Chem. Phys., 53, 1891 (1970).
(17) G. M. Sheldrick, Program for Crystal Structure Determination, University
Chemical Laboratory, Cambridge, 1976.
(18) W. R. Busing, K. 0. Martin, and H. A. Levy, &quot;ORFFE, a Fortran
Crystallographic Function and Error Program&quot;, Report ORNL-TM-
306, Oak Ridge National Laboratory, Oak Ridge, Tenn.
(19) D. M. Blow, Acta Crystallogr., 13, 168 (1960).
(20) C. K. Johnson, &quot;ORTEP, a Fortran Ellipsoid Plot Program for Crystal
Structure Illustration'', Report ORNL-3794, Oak Ridge National
Laboratory, Oak Ridge, Tenn.


25) With use of 0 = 1.4 N = 1.5 and GrdeniE‘s” upper limit of
1.73 A for the radius of mercury. This has been suggested as a general
value for the van der Waals radius of mercury, although some interactions
at distances corresponding to a larger radius cannot be excluded.**
(26) L. Pauling, “The Nature of the Chemical Bond, 3rd ed., Cornell
University Press, Ithaca, N.Y., 1960, p 260.
(27) D. Grdenit, Q. Rev., Chem. SOC.1, 9, 303 (1965).
(28) A. J. Canty and G. B. Deacon, Inorg. Chim. Acta, 45, L225 (1980).
(29) N. W. Alcock, P. A. Lamp+, and P. Moore, J. Chem. Soc., Dalton
Trans., 1324 (1978).


(30) R. B. Simpson, J. Am. Chem. Soc., 83, 4711 (1961).
(31) G. Geier, I. Erni, and R. Steiner, Hela Chim. A m , 60, 9 (1977).

1) (a) Massachusetts Institute of Technology. (b) Harvard Medical School
and Brigham and Women’s Hospital.
(2) Trop, H. S.; Davison, A,; Jones, A. G.; Davis, M. A,; Szalda, D. J.;
Lippard, S. J. Inorg. Chem. 1980,19, 1105-1110.
( 3 ) Trop, H. S.; Davison, A. J. Inorg. Nucl. Chem. 1979, 41, 271-272.
(4) Cotton, F. A.; Wilkinson, G. “Advanced Inorganic Chemistry”, 4th ed.;
Interscience: New York, 1980; p 896.
(5) Davison, A.; Orvig, C.; Trop, H. S.; Sohn, M.; DePamphilis, B. V.;
Jones, A. G. Inorg. Chem. 1980, 19, 1988-1992.
(6) Cotton, F. A.; Davison, A,; Day,

(7) Thomas, R. W.; Davison, A.; Trop, H. S.; Deutsch, E. Inorg. Chem.
1980, 19,284C-2842." name="eprints.referencetext" />
<meta content="Canty, A.J. and Chaichit, N. and Gatehouse, B.M. and George, E.E. (1981) Coordination Chemistry of Methylmercury(II). Complexes of Aromatic Nitrogen DonorTripod Ligands Involving New Coordination Geometries for MeHg(II). Inorganic Chemistry, 20 (12). pp. 4293-4300. ISSN 0020-1669" name="eprints.citation" />
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<meta content="Complexes [MeHgL]N03 {L = diphenyl(2-pyridy1)methane (pyCHPh2), bis(2-pyridy1)phenylmethane [(py)2CHPh], and the tripod ligands tris(2-pyridy1)carbinol [(py)3COH] and bis(2-pyridyl)(N-methyl-2-imidazolyl)carbinol [(py)2(NMeIm)COH]} are obtained from addition reactions in acetone. The ligand (py)2CHPh is formed on reaction of (2-benzylpyridy1)lithium with 2-bromopyridine. 1H NMR spectra indicate that (py)2CHPh and (py)2(N-Me1m)COH are present as bidentates in methanol solutions of their complexes, with the latter coordinated via the imidazolyl ring and one pyridyl ring. Spectra are consistent with the presence of weak pi interactions between mercury and phenyl rings in the
(py)CHPh2 and (py)2CHPh complexes and the uncoordinated pyridyl ring in the (py)2(N-Me1m)COH complex. In complexes
[MeHgL]N03 (L = (py)3OH, (py)3CH) the ligands are present as tridentates in methanol. Crystalline [MeHgL]NO3
[L = (py)3OH, (py)2(N-MeIm)COH] have the tripod ligands coordinating as tridentates, with irregular coordination
geometries based on a dominant C-Hg-N’ moiety [Hg-N’ = 2.28 (1) A, C-Hg-N’ = 150(1)O ((py)3COH) and 2.13(1) A, 170(0) ((py)2(N-MeIm)COH)] with weaker Hg-N,N” bonds [2.45(l), 2.53(1) ((py)3OH) and 2.66(l), 2.71(1) A ((py)2(N-MeIm)COH)]. For [MeHg((py)2(N-MeIm)COH)] the coordination geometry resembles a trigonal bipyramid lacking one equatorial donor and with axial direction C-Hg-N’." name="DC.description" />
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    <h1 class="ep_tm_pagetitle">Coordination Chemistry of Methylmercury(II). Complexes of Aromatic Nitrogen DonorTripod Ligands Involving New Coordination Geometries for MeHg(II)</h1>
    <p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Canty, A.J.</span> and <span class="person_name">Chaichit, N.</span> and <span class="person_name">Gatehouse, B.M.</span> and <span class="person_name">George, E.E.</span> (1981) <xhtml:em>Coordination Chemistry of Methylmercury(II). Complexes of Aromatic Nitrogen DonorTripod Ligands Involving New Coordination Geometries for MeHg(II).</xhtml:em> Inorganic Chemistry, 20 (12). pp. 4293-4300. ISSN 0020-1669</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/2830/1/IC1981_2C_4293.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/2830/1/IC1981_2C_4293.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />932Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="4062" 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/ic50226a052">http://dx.doi.org/10.1021/ic50226a052</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Complexes [MeHgL]N03 {L = diphenyl(2-pyridy1)methane (pyCHPh2), bis(2-pyridy1)phenylmethane [(py)2CHPh], and the tripod ligands tris(2-pyridy1)carbinol [(py)3COH] and bis(2-pyridyl)(N-methyl-2-imidazolyl)carbinol [(py)2(NMeIm)COH]} are obtained from addition reactions in acetone. The ligand (py)2CHPh is formed on reaction of (2-benzylpyridy1)lithium with 2-bromopyridine. 1H NMR spectra indicate that (py)2CHPh and (py)2(N-Me1m)COH are present as bidentates in methanol solutions of their complexes, with the latter coordinated via the imidazolyl ring and one pyridyl ring. Spectra are consistent with the presence of weak pi interactions between mercury and phenyl rings in the&#13;
(py)CHPh2 and (py)2CHPh complexes and the uncoordinated pyridyl ring in the (py)2(N-Me1m)COH complex. In complexes&#13;
[MeHgL]N03 (L = (py)3OH, (py)3CH) the ligands are present as tridentates in methanol. Crystalline [MeHgL]NO3&#13;
[L = (py)3OH, (py)2(N-MeIm)COH] have the tripod ligands coordinating as tridentates, with irregular coordination&#13;
geometries based on a dominant C-Hg-N’ moiety [Hg-N’ = 2.28 (1) A, C-Hg-N’ = 150(1)O ((py)3COH) and 2.13(1) A, 170(0) ((py)2(N-MeIm)COH)] with weaker Hg-N,N” bonds [2.45(l), 2.53(1) ((py)3OH) and 2.66(l), 2.71(1) A ((py)2(N-MeIm)COH)]. For [MeHg((py)2(N-MeIm)COH)] the coordination geometry resembles a trigonal bipyramid lacking one equatorial donor and with axial direction C-Hg-N’.</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 &gt; 259900 Other Chemical Sciences &gt; 259901 Organometallic Chemistry</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">2830</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 15:46</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">11 Jan 2008 15:46</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=2830;">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&amp;eprintid=2830">item control page</a></p>
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