Ca(II) and Yb(II) complexes featuring M(C≡C)4 structural motif: enforced proximity or genuine η2‐bonding?
Bis(carbazolide) complexes M[3,6‐tBu2‐1,8‐(RC≡C)2Carb]2(THF)n (R=SiMe3, n=0, M=Ca, Yb; R=Ph, n=1, M=Ca, Yb; n=0, M=Yb) were synthesized through transamination reaction of M[N(SiMe3)2]2(THF)2 with two molar equivalents of carbazoles. The complexes feature M(η2‐C≡C)4 structural motif composed of M(II) ions encapsulated by four acetylene fragments due to atypical for alkaline‐ and rare‐earth metals η2‐interactions with triple C≡C bond. This interaction is evidenced experimentally by X‐ray diffraction, Raman spectroscopy in the solid state and by NMR‐spectroscopy in the solution. According to QTAIM analysis there are 4 bond critical points (3;−1) between the metal atom and each of the triple bonds, which are connected by a strongly curved, almost T‐shaped bond pathway.
Top-30
Journals
|
1
|
|
|
Inorganic Chemistry Frontiers
1 publication, 20%
|
|
|
Mendeleev Communications
1 publication, 20%
|
|
|
Nature
1 publication, 20%
|
|
|
Journal of the American Chemical Society
1 publication, 20%
|
|
|
Russian Chemical Bulletin
1 publication, 20%
|
|
|
1
|
Publishers
|
1
2
|
|
|
Springer Nature
2 publications, 40%
|
|
|
Royal Society of Chemistry (RSC)
1 publication, 20%
|
|
|
OOO Zhurnal "Mendeleevskie Soobshcheniya"
1 publication, 20%
|
|
|
American Chemical Society (ACS)
1 publication, 20%
|
|
|
1
2
|
- We do not take into account publications without a DOI.
- Statistics recalculated weekly.