Silylenes and germylenes: The activation of H–H bond in hydrogen molecule

N-Heterocyclic Germylenes NHGe – Old Trends and New Developments

“…The findings are supported by theoretical investigations on acyclic and Meller germylenes performed by Wang and Ma [14]. They calculated the reaction of molecular hydrogen H 2 with a series of germylenes.…”

“…Likewise, the influence of aromaticity towards NHGe stabilisation is recognised to be much smaller than that in the lighter homologues [22]. An interesting contribution towards a quantitative determination of the aromatic stabilisation comes from a theoretical calculation by Wang and Ma [14], who investigated the addition of H 2 to the germanium centre of cyclic and acyclic germylenes. Another theoretical investigation describes the reactivities of cationic six-membered NHGe [15] (see Fig.…”

Compounds with Low‐Valent p‐Block Elements for Small Molecule Activation and Catalysis

“…Subsequently, the reaction pathway of splitting hydrogen is energetically favored for VIII and IX , and disfavored for X . In addition, the authors also showed that the larger the obtuse angles, more the preference for single‐site activation, a hypothesis earlier put forward by Wang and Ma …”

On the Way to N‐Heterocyclic Silylenes with a 1,1′‐Ferrocenediyl Backbone: Synthesis and Structures of Silicon(IV) Compounds of the Type [Fe{(η5‐C5H4)NR}2SiX2]

“…Note that in our previous work on ferrocene‐based N‐heterocyclic carbenes, germylenes and stannylenes of the type [Fe{(η 5 ‐C 5 H 4 )NR} 2 E :] ( E = C, Ge, Sn) we found without exception that the N– E –N angles of these cyclic compounds are very similar to the values of the corresponding acyclic congeners. [11c], [11d], The bond angle at the divalent tetrel atom is crucial for the reactivity of such compounds, with larger bond angles causing smaller HOMO–LUMO separations and singlet‐triplet gaps due to higher p‐character of the lone pair …”