Reactions of cationic rhodium(I) carbonyl compounds with nucleophiles to form alkoxo, carboalkoxy and carboxylato complexes. Part II
✍ Scribed by E. Wynne Evans; Mohammed B. H. Howlader; Mark T. Atlay
- Publisher
- Springer
- Year
- 1994
- Tongue
- English
- Weight
- 322 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0340-4285
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✦ Synopsis
The rhodium(I) carbonyl compounds [-Rh(CO)L2] [BF4]. 89 (L = PPh 3 or AsPh3) react with the nucleophiles OMe-, RCOO-(R = Me, Et) under nitrogen to form [Rh(OR)(CO)L2] (1)-(2) and [Rh(OOCR)(CO)L23 (7)-(i0), respectively. Addition of [Rh(CO)2(PPh3)2]-[BF4] to OMe-under nitrogen produces [Rh(COOMe)-(CO)(PPh3)2].MeOH (3), whilst reactions of I-Rh(CO)-(PPh3)2] I-BF4]' 89 and [-Rh(CO)2(PPh3)2] [BF4] with OR-(R = Me, Et or n-Pr) in thc presence of CO produce [Rh(COOR)(CO)2(PPh3)2] (4)-( 6). The products have been characterised by i.r., all, 3~p, ~3Cn.m.r ' spectroscopy and elemental analysis.
then NaOMe solution (ca. 1.10 mmol in 5 cm 3 of MeOH) was added and the mixture stirred at ambient temperature. Yellow crystals formed within 30 min, which were collected by filtration, washed with MeOH, then dried in vacuo.
Preparation of trans-f Rh( COO Me ) (CO) ( PPh 3)2]. MeOH (3) [Rh(CO)z( PPh3)2][-BF4] (0.40g, 0.52mmol) was added to NaOMe solution (ca. 0.80 mmol in 20cm 3 of MeOH) and the mixture stirred under nitrogen for 30rain. The yellow product was collected by filtration, washed with MeOH and dried in vacuo.