An N-heterocyclic boryloxy ligand isoelectronic with N-heterocyclic imines: access to an acyclic dioxysilylene and its heavier congeners
We introduce a new type of strongly donating N-heterocyclic boryloxy (NHBO) ligand, [(HCDippN)₂BO]¯, which is isoelectronic with the well-known N-heterocyclic iminato (NHI) donor class. This 1,3,2-diazaborole functionalized oxy ligand can be employed to stabilize the first acyclic two-coordinate dio...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Wiley
2019
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| Summary: | We introduce a new type of strongly donating N-heterocyclic boryloxy (NHBO) ligand, [(HCDippN)₂BO]¯, which is isoelectronic with the well-known N-heterocyclic iminato (NHI) donor class. This 1,3,2-diazaborole functionalized oxy ligand can be employed to stabilize the first acyclic two-coordinate dioxysilylene and its Ge, Sn and Pb congeners, thereby presenting the first complete series of heavier group 14 dioxycarbene analogues. All four compounds have been characterized by X-ray crystallography and Density Functional Theory (DFT), enabling analysis of periodic trends: the potential for the [(HCDippN)₂BO]¯ ligand to subtly vary its electronic donor capabilities is revealed via snapshots revealing gradual evolution of arene π-coordination on going from Si to Pb. |
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