التفاصيل البيبلوغرافية
| العنوان: |
Reactions of (mesityl)n(methyl)2−nsilylene complexes with pyridine-N-oxide (n = 1 and 0): formation of silanone complexes and a disiloxanyloxy complex. |
| المؤلفون: |
Muraoka, Takako, Ishita, Taichi, Kawachi, Kosuke, Nishio, Takuya, Ishihara, Hiroto, Ueno, Keiji |
| المصدر: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 4/28/2024, Vol. 53 Issue 16, p7105-7114, 10p |
| مصطلحات موضوعية: |
LEWIS bases, PYRIDINE, TUNGSTEN, MOLYBDENUM, KETONES |
| مستخلص: |
Silanones (O＝SiR2), a heavier congener of ketones (R2C＝O), are highly reactive species that are readily converted to oligomeric siloxane (O–SiR2)n. Coordination of silanones to the transition-metal fragments to afford silanone-coordinated complexes is a reliable silanone stabilization method. Recently, our group reported the synthesis, structures, and reactivity of dimesityl-substituted silanone complexes Cp*(OC)2M{O＝SiMes2(L)}(SiMe3) (M = W, Mo, L: Lewis base, Cp*: η5-C5Me5, Mes: 2,4,6-Me3C6H2). Herein, to investigate the effect of substituents on the silicon atom during the formation of a silanone complex, we demonstrated the use of Mes and smaller Me groups. As a result, the formation of Mes(Me)-substituted silanone molybdenum complex Cp*(OC)2Mo{O＝SiMes(Me)(py)}(SiMe3) (5b, py: pyridine) was suggested, the silanone tungsten complex Cp*(OC)2W{O＝SiMes(Me)(DMAP)}(SiMe3) (4a, DMAP: 4-(dimethylamino)pyridine) was obtained, and a dimethyl-substituted disiloxanyloxy(dioxo) complex Cp*(O)2W(OSiMe2OSiMe3) (9) was formed. The reaction of 4a with PMe3 proceeded via the elimination of DMAP and migration of the SiMe3 group to the oxygen atom of the silanone ligand to afford Cp*(OC)2W(SiMes(Me)OSiMe3)(PMe3) (11a). The Mo complex Cp*(OC)2Mo(SiMes(Me)OSiMe3)(PMe3) (11b) was produced by the reaction of Cp*(OC)2Mo{＝SiMes(Me)}(SiMe3) (7b) with pyridine-N-oxide in the presence of PMe3. [ABSTRACT FROM AUTHOR] |
|
Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
