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Synthesis and X-ray crystal structures of hypervalent arsenic compounds bearing arsenic-iron bonds

✍ Scribed by Yohsuke Yamamoto; Koichiro Toyota; Yukiya Wakisaka; Kin-ya Akiba

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 229 KB
Volume: 11
Category: Article
ISSN: 1042-7163
DOI: 10.1002/(sici)1098-1071(2000)11:1<42::aid-hc7>3.0.co;2-1

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✦ Synopsis

A hypervalent arsorane with an As-Fe bond [6: Rf 2 As*FeCp(CO) 2 (Rf: o-C 6 H 4 C(CF 3 ) 2 O-)] was synthesized by the reaction of the arsoranide anion (4-Et 4 N: Rf 2 As* -Et 4 N ‫ם‬ ) with CpFe(CO) 2 I (5) in the presence of AgBF 4 . Diastereomeric arsoranes {7a and 7b: Rf 2 As*Fe*Cp(CO)(PPh 3 )} were prepared by irradiation of 6 with a tungsten lamp in the presence of triphenylphosphine. X-ray crystallographic analysis of 6 and 7a showed that the apical As-O bond lengths of these compounds are slightly longer than the equatorial As-C bonds. It is concluded that an electron-donating group at the equatorial position elongates the apical E-O bond by electron donation to the apical oxygens.

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