107
Ag atoms react with ketene in a rotating cryostat at 77 K to give two major paramagnetic products, a monoligand π-complex, Ag[CH2CO] and a 2-silver-1-oxallyl, CH2C(Ag)O and one minor product formed by addition of Ag to the carbonyl function that has tentatively been identified as α-silver oxyvinyl. These paramagnetic species have been examined by ESR spectroscopy and their magnetic parameters are reported. Au atoms also add to CH2CO to give 2-gold-1-oxallyl [CH2C(Au)O] and a π-complex, Au[CH2CO]. The spectrum from Cu and CH2CO is poorly resolved at low temperatures but the spectrum of 2-copper-1-oxallyl appears upon warming. This species seems to have two non-equivalent hydrogens at low temperatures which become equivalent above 273 K.
107 Ag原子在77 K下旋转低温恒温器中与
乙烯酮反应,生成两种主要的顺磁性产物:单
配体π-配合物Ag[CH2CO]和2-
银-1-氧代烯丙基CH2C(Ag)O,以及一种次要产物,该产物由Ag加成到羰基上形成,初步鉴定为α-
银氧代
乙烯基。这些顺磁性物种通过ESR光谱进行了研究,并报告了它们的磁性参数。Au原子也与CH2CO反应生成2-
金-1-氧代烯丙基[CH2C(Au)O]和一种π-配合物Au[CH2CO]。Cu和CH2CO的光谱在低温下解析不佳,但随着升温,出现了2-
铜-1-氧代烯丙基的光谱。这种物种在低温下似乎有两个不等价的氢原子,在273 K以上变为等价。