SCHEDULED MAINTENANCE
Straightforward access to chalcogenoureas derived from N-heterocyclic carbenes and their coordination chemistry†
David J.
Nelson, 
*b
Tahani
A. C. A. Bayrakdar,
a
Steven P.
Nolan,
*a
Fady
Nahra
*ac
and
Kristof
Van Hecke
*a
*b
Tahani
A. C. A. Bayrakdar,
a
Steven P.
Nolan,
*a
Fady
Nahra
*ac
and
Kristof
Van Hecke
*a
Abstract
Chalcogen-based urea compounds supported by a wide range of N-heterocyclic carbenes are synthesised and fully characterised. Coordination of selenoureas is further explored with Group 11 transition metals to form new copper, gold and silver complexes. Single crystal X-ray analyses unambiguously establish the solid-state coordination of these complexes and show that the geometry of a complex is highly influenced by a combination of electronic properties – mainly π-accepting ability – and steric hindrance of the ligands, as well as the nature of the metal, affording a variety of coordination behaviours. In this report, we investigate these phenomena using several experimental methods.
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