Table 1

Cluster-bridging nitride geometries and representative complexes

Bridging geometryRepresentative clusterCSD refcode*
μ3
 Pyramidal[{Cp*Ti(μ-NH)}33-N)]SAXSEP
 T-shaped[{CpMo(CO)2}2{CpMo(O)}(μ3-N)]BAXFEL
 Trigonal planar[{CpMo(O)(SMe)(μ3-N)}{(CpMo)22-SMe)3}]GOTZO
μ4
 Sawhorse[Fe44-N)(CO)12]PRUFEB
 Basal trigonal pyramidal[PtRu3(μ-H)(μ4-N)(CO)10P(i-Pr)3]QUDMOR
 Interstitial tetrahedral§[Au44-N)(PPh3)4]+CUGPUP
μ5
 Basal square pyramidal[Fe55-N)(μ-CO)2(CO)12]CABROM10
 Interstitial distorted[PtRh105-N)(μ-CO)10(CO)11]3−BENPOZ
 Interstitial trigonal bipyramidal§[Au55-N)(PPh3)5]2+SEVJUY
μ6
 Interstitial octahedral[Fe66-N)(μ-CO)3(CO)12]3−ZUCWAV
 Interstitial trigonal prismatic[Co66-N)(μ-CO)9(CO)6]PIMNCO
  • * Cambridge Structural Database, version 5.23. 

  • Rare. 

  • Exposed nitrides centered in (or protruding slightly from) the basal face (triangular or square) of a pyramidal coordination polyhedron. 

  • § Au(I) only. 

  • Usually found within high-nuclearity clusters.