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A general method for the preparation of N-heterocyclic carbene–silver(I) complexes in water

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A new synthetic method leading to N-heterocyclic carbene–silver(I) complexes [(R2-NHC)2Ag]+ [AgX2] is developed by using benzimidazolium compounds, NaOH (as a base), silver salts and water (as the reaction medium). Single-crystal X-ray structure revealed that compound 1 comprises a linear [Ag-(Et2-Bimy)2]+ cation and a linear [AgBr2] anion. These two ions are linked through an AgI–AgI association and staggered at an angle of 90.3°.

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Scheme 1
Fig. 1
Scheme 2


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Correspondence to Muhammad Jawwad Saif.

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Saif, M.J., Flower, K.R. A general method for the preparation of N-heterocyclic carbene–silver(I) complexes in water. Transition Met Chem 38, 113–118 (2013). https://doi.org/10.1007/s11243-012-9667-3

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  • Carbene
  • AgBr
  • Silver Salt
  • Silver Oxide
  • Allyl Bromide