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Citation
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HERO ID
1797834
Reference Type
Journal Article
Title
Synthesis and onwards coordination of an As(I) centered zwitterion
Author(s)
Dube, JW; Ragogna, PJ
Year
2013
Is Peer Reviewed?
Yes
Journal
Chemistry: A European Journal
ISSN:
0947-6539
EISSN:
1521-3765
Volume
19
Issue
35
Page Numbers
11768-11775
Language
English
PMID
23846815
DOI
10.1002/chem.201301003
Web of Science Id
WOS:000323196500044
Abstract
The bis(phosphino)borate ligand class is used as an anionic anchor to stabilize reactive, low coordinate arsenic centers. The neutral, zwitterionic As(I) species, 2, is formed very cleanly, and isolated in good yields using cyclohexene as a halogen scavenger. The uniqueness of this heterocyclic As(I) compound is on display with the coordination to Group 6 metal centers, (2 M(CO)5 ; M=Cr, Mo, W). The arsenicmetal bond lengths are longer than the related AsPh3 complexes suggesting that compound 2 is a weak sigma donor. The metal complexes reveal a trigonal pyramidal arsenic atom, which provides the first experimental evidence for the presence of two "lone pairs" of electrons on the As(I) center. When more flexible and more electron-donating isopropyl substituents were used, an intermediate (compound 5) in the formation of low coordinate pnictogen compounds was crystallographically characterized. This structure, formally a base-stabilized dichloroarsenium cation, provides an alternative mechanistic proposal to the one described in the literature.
Keywords
arsenic; coordination chemistry; low coordinate; low oxidation state; zwitterions
Tags
IRIS
•
Arsenic Hazard ID
PubMed
Considered New
PubMed
Considered New
WOS
Considered New
2. Lit Search Updates through Oct 2015
PubMed
WOS
Considered
7. Other Studies through Oct 2015
Physical Chemistry/Engineering
•
Arsenic (Inorganic)
1. Literature
Lit search updates through Oct 2015
3. Hazard ID Screening
Other potentially supporting studies
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