E. Fritsch et al., ORGANOMETAL LEWIS-ACIDS .52. CATIONIC PEN TACARBONYLCARBENE COMPLEXESOF MANGANESE AND RHENIUM, Journal of organometallic chemistry, 460(2), 1993, pp. 30000025-30000027
The pentacarbonyltetrafluoroborato complexes (OC)(5)MFBF(3) react with
3-butyne-1-o1 to give the cyclic oxycarbene complexes [(OC)(5)M= COCH
2CH2CH2](BF4-)-B-+ (1:M = Mn; 2:M = Re). The structure of 2 has been d
etermined by X-ray diffraction.