Organometallics p. 513 - 518 (1998)
Update date:2022-09-26
Topics:
Yih, Kuang-Hway
Yeh, Sung-Chih
Lin, Ying-Chih
Lee, Gene-Hsiang
Wang, Yu
Alkylation reactions at the S atom of the anionic PPh2C(=NPh)S- ligand coordinated to a tungsten pentacarbonyl group afford the neutral complexes W(CO)5PPh2C(=NPh)SR (4, R = CH2C≡CH; 5, R = CH2C≡N; 6, R = CH2CONH2; 7, R = CH2CH=CH2; 8, R = CH2CO2-Me). Protonation of 4 with HBF4 at room temperature causes cyclization to the cationic complex W(CO)5PPh2[CSCH2C(CH2)NPh]BF 4 (10), which contains a (thiazoliumyl)diphenylphosphine ligand. Similarly, protonation reactions of 5 and 6 with HBF4 give the cationic complex [W(CO)5PPh2CSCHC(NH2)NPh]BF4 (11) and the neutral complex W(CO)5PPh2CSCHC-(OBF3)NPh (12), respectively, both of which contain (thiazoliumyl)diphenylphosphine ligands. The structures of 10 and 12 are determined by X-ray diffraction analyses.
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