Ketenes in the limelight: The influential role of ketenes has never been adequately acknowledged in zeolite chemistry and catalysis; unlike other first generation highly reactive intermediates, such as carbocations, carbanions, radicals, and carbenes. In fact, the role that ketenes play during catalysis—whether beneficial or detrimental—is a contentious subject that requires further consideration.

中文翻译：

---

沸石化学和催化作用中烯酮的奇怪案例

酮烯成为人们关注的焦点：烯酮的影响作用在沸石化学和催化中从未得到充分的认识。不像其他第一代高反应性中间体，例如碳正离子，碳负离子，自由基和碳烯。实际上，烯酮在催化过程中所起的作用（无论是有益的还是有害的）都是有争议的主题，需要进一步考虑。