Electron rich acetylide clusters; molecular and electronic structure and reactions of Os3(CO)7(µ2-η2-C![[triple bond, length half m-dash]](https://www.rsc.org/images/entities/char_e007.gif)
CR)2(µ-PPh2)2(R = Ph, Pri); 50-electron species with expanded metal frameworks
Abstract
The reactivity of the 50-electron acetylide clusters Os3(CO)7(µ2-η2-CCR)2(µ-PPh2)2[(1a) R = Ph; (1b) R = Pri] which have unusual expanded Os3 frameworks, is dominated by nucleophilic addition at the metals: the molecular structures of Os3(CO)7(µ2-η2-CCPri)2(µ-PPh2)2 and the ethylamine adduct of (1a), Os3(CO)6(µ2-η2-CCPh)(η1-CCPh)(µ-PPh2)2(EtNH2)2(2a) have been determined by X-ray diffraction and their electronic structures probed by EHMO calculations.
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![[triple bond, length half m-dash]](https://www.rsc.org/images/entities/h2_char_e007.gif)
CR)2(µ-PPh2)2(R = Ph, Pri); 50-electron species with expanded metal frameworks