Synthesis and Structure of [(PPh2=E)2C=Mg]2 (E = S, NSiMe3) : novel magnesium carbene complexes.

Novel magnesium bis(diphenylphosphorano)methaniide complexes have been synthesized and characterized. Reaction of [Ph2PCH2PPh2] with sulphur afforded the ligand [CH2(PPh2=S)2] (1). Treatment of 1 with Mg(nBu)2 gave the first example of magnesium bis(diphenylthiophosphorano)methaniide complex [(PPh2...

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Main Author: Foo, Ming Choo.
Other Authors: School of Physical and Mathematical Sciences
Format: Final Year Project
Language:English
Published: 2009
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Online Access:http://hdl.handle.net/10356/19057
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-190572023-02-28T23:17:08Z Synthesis and Structure of [(PPh2=E)2C=Mg]2 (E = S, NSiMe3) : novel magnesium carbene complexes. Foo, Ming Choo. School of Physical and Mathematical Sciences So Cheuk Wai DRNTU::Science::Chemistry::Organic chemistry::Organometallic compounds Novel magnesium bis(diphenylphosphorano)methaniide complexes have been synthesized and characterized. Reaction of [Ph2PCH2PPh2] with sulphur afforded the ligand [CH2(PPh2=S)2] (1). Treatment of 1 with Mg(nBu)2 gave the first example of magnesium bis(diphenylthiophosphorano)methaniide complex [(PPh2=S)2C=Mg]2 (2). Reaction of [Ph2PCH2PPh2] with azidotrimethylsilane afforded the ligand [CH2(PPh2=NSiMe3)2] (3). Treatment of 3 with Mg(nBu)2 gave novel [(PPh2=NSiMe3)2C=Mg]2 (4). X-ray structure analyses of 2 and 4 confirmed that the two magnesium carbene moieties [(PPh2=S)2C=Mg] in 2 dimerized in a head-to-head manner while the two magnesium carbene moieties [(PPh2=NSiMe3)2C=Mg] in 4 dimerized in a head-to-tail manner. The synthesis of 2 and 4 are highly significant as they demonstrate the existence of C=Mg double bond. Bachelor of Science in Chemistry and Biological Chemistry 2009-09-16T02:49:16Z 2009-09-16T02:49:16Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/19057 en 41 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Chemistry::Organic chemistry::Organometallic compounds
spellingShingle DRNTU::Science::Chemistry::Organic chemistry::Organometallic compounds
Foo, Ming Choo.
Synthesis and Structure of [(PPh2=E)2C=Mg]2 (E = S, NSiMe3) : novel magnesium carbene complexes.
description Novel magnesium bis(diphenylphosphorano)methaniide complexes have been synthesized and characterized. Reaction of [Ph2PCH2PPh2] with sulphur afforded the ligand [CH2(PPh2=S)2] (1). Treatment of 1 with Mg(nBu)2 gave the first example of magnesium bis(diphenylthiophosphorano)methaniide complex [(PPh2=S)2C=Mg]2 (2). Reaction of [Ph2PCH2PPh2] with azidotrimethylsilane afforded the ligand [CH2(PPh2=NSiMe3)2] (3). Treatment of 3 with Mg(nBu)2 gave novel [(PPh2=NSiMe3)2C=Mg]2 (4). X-ray structure analyses of 2 and 4 confirmed that the two magnesium carbene moieties [(PPh2=S)2C=Mg] in 2 dimerized in a head-to-head manner while the two magnesium carbene moieties [(PPh2=NSiMe3)2C=Mg] in 4 dimerized in a head-to-tail manner. The synthesis of 2 and 4 are highly significant as they demonstrate the existence of C=Mg double bond.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Foo, Ming Choo.
format Final Year Project
author Foo, Ming Choo.
author_sort Foo, Ming Choo.
title Synthesis and Structure of [(PPh2=E)2C=Mg]2 (E = S, NSiMe3) : novel magnesium carbene complexes.
title_short Synthesis and Structure of [(PPh2=E)2C=Mg]2 (E = S, NSiMe3) : novel magnesium carbene complexes.
title_full Synthesis and Structure of [(PPh2=E)2C=Mg]2 (E = S, NSiMe3) : novel magnesium carbene complexes.
title_fullStr Synthesis and Structure of [(PPh2=E)2C=Mg]2 (E = S, NSiMe3) : novel magnesium carbene complexes.
title_full_unstemmed Synthesis and Structure of [(PPh2=E)2C=Mg]2 (E = S, NSiMe3) : novel magnesium carbene complexes.
title_sort synthesis and structure of [(pph2=e)2c=mg]2 (e = s, nsime3) : novel magnesium carbene complexes.
publishDate 2009
url http://hdl.handle.net/10356/19057
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