Open-shell carbenes, which feature two unpaired electrons on a carbene carbon centre, are highly unstable compounds and are usually observed as excited-state species. Now, two triplet metallocarbenes have been stabilized by transition-metal and silyl substituents; the compounds have been characterized by various techniques including single-crystal X-ray diffraction, spectroscopy and quantum-chemical analyses.

中文翻译：

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三重态金属卡宾，具有碳心自旋定位


开壳卡宾在卡宾碳中心上具有两个不成对的电子，是高度不稳定的化合物，通常被视为激发态物质。现在，两种三联态金属卡宾已经被过渡金属和硅烷基取代基稳定;这些化合物已经通过各种技术进行了表征，包括单晶 X 射线衍射、光谱学和量子化学分析。