Schwank ITBU User Manual download pdf (Page 144)

Summary

122

Scheme 91. Synthesis of 106.

Treatment of 103 with different isonitriles leads to the formation of two isomers (Scheme 92).

Isomer a is characterised by an insertion of an isonitrile in the Mn−B bond, while isomer b

contains an isonitrile bridging the Mn−B bond. The isomeric distribution does not reflect any

obvious electronical or sterical trend. Therefore, additional theoretical investigations will be

necessary. Also, the isomeric distribution is not affected by variation of the solvent or

temperature during the syntheses.

Scheme 92. Reaction of 103 with different isonitriles.

Addition of two equivalents of CNtBu to the borylene complex 53 leads to only one isomer in

which one isonitrile is coordinated to the boron centre as a Lewis base and the other bridges

the Mn−B bond (Scheme 93).

1 2 ... 139 140 141 142 143 144 145 146 147 148 149 ... 199 200

No comments

Schwank ITBU User Manual Page 144