Isolation of an Anionic Dicarbene Embedded Sn 2 P 2 Cluster and Reversible CO 2 Uptake.

Decarbonylation of a cyclic bis-phosphaethynolatostannylene [(ADC)Sn(PCO)] 2 based on an anionic dicarbene framework (ADC = PhC{N(Dipp)C} 2 ; Dipp = 2,6-iPr 2 C 6 H 3 ) under UV light results in the formation of a Sn 2 P 2 cluster compound [(ADC)SnP] 2 as a green crystalline solid. The electronic structure of [(ADC)SnP] 2 is analyzed by quantum-chemical calculations. At room temperature, [(ADC)SnP] 2 reversibly binds with CO 2 and forms [(ADC) 2 {SnOC(O)P}SnP]. [(ADC)SnP] 2 enables catalytic hydroboration of CO 2 and reacts with elemental selenium and Fe 2 (CO) 9 to afford [(ADC) 2 {Sn(Se)P 2 }SnSe] and [(ADC)Sn{Fe(CO) 4 }P] 2 , respectively. All compounds are characterized by multinuclear NMR spectroscopy and their solid-state molecular structures are determined by single-crystal X-ray diffraction.