TY - JOUR
T1 - Silicon-silicon interaction in bis(silylene)iron, disilanyliron, and bis(silyl)iron complexes
AU - Ueno, Keiji
AU - Tobita, Hiromi
AU - Ogino, Hiroshi
N1 - Funding Information:
We are grateful to Prof. Hideki Sakurai and Kao Corporation for help with INEPT-INADEQUATE 29SiN MR measurementsT. his work was supportedb y the Grant-in-Aid for Scientific Research on Priority Area of Organic Unusual Valency No. 03233201fr om the Ministry of Education, Science and Culture, Japan.
PY - 1992/6/2
Y1 - 1992/6/2
N2 - 29Si NMR coupling constants in a disilanyliron complex CpFe(CO)2SiMe2SiMe(OtBu)2 (1: CP = η5C5H5), a bis(silylene)iron complex Cp(OC)Fe{SiMe2 ⋯ O(tBu) ⋯ SiMeOtBu)} (2), and a cis-bis(silyl)iron complex (OC)4Fe{SiMe2CH2CH2SiMePh} (3) were measured by the INEPT-INADE-QUATE technique. The coupling constant for 2 (28.6 Hz) is much smaller than that for 1 (128 Hz) with a direct Si-Si bond, but larger than that for 3 (2.7 Hz) where there is no direct Si-Si bond. Model calculations using the extended Hückel method indicate that there is no direct bond between the two silicon atoms in the bis(silylene)iron complex Cp(OC)Fe{SiH2 ⋯ O(H) ⋯ SiH2}. This means that the coupling in 2 can be described as the sum of the two geminal couplings, 2J(SiFeSi) and 2J(SiOSi).
AB - 29Si NMR coupling constants in a disilanyliron complex CpFe(CO)2SiMe2SiMe(OtBu)2 (1: CP = η5C5H5), a bis(silylene)iron complex Cp(OC)Fe{SiMe2 ⋯ O(tBu) ⋯ SiMeOtBu)} (2), and a cis-bis(silyl)iron complex (OC)4Fe{SiMe2CH2CH2SiMePh} (3) were measured by the INEPT-INADE-QUATE technique. The coupling constant for 2 (28.6 Hz) is much smaller than that for 1 (128 Hz) with a direct Si-Si bond, but larger than that for 3 (2.7 Hz) where there is no direct Si-Si bond. Model calculations using the extended Hückel method indicate that there is no direct bond between the two silicon atoms in the bis(silylene)iron complex Cp(OC)Fe{SiH2 ⋯ O(H) ⋯ SiH2}. This means that the coupling in 2 can be described as the sum of the two geminal couplings, 2J(SiFeSi) and 2J(SiOSi).
UR - http://www.scopus.com/inward/record.url?scp=0001815954&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0001815954&partnerID=8YFLogxK
U2 - 10.1016/0022-328X(92)80099-J
DO - 10.1016/0022-328X(92)80099-J
M3 - Article
AN - SCOPUS:0001815954
SN - 0022-328X
VL - 430
SP - 93
EP - 104
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 1
ER -