What are the physical and chemical properties of oxo-[(5-oxoboranyloxy-2,4,6,8,10,12,13-heptaoxa-1,5,7,11-tetrabora-3$l^{2},9$l^{2}-dizincabicyclo[5.5.1]tridecan-11-yl)oxy]borane (CAS: 138265-88-0)?

This compound is a complex organoborane with a high molecular weight due to its multiple boron and oxygen atoms. It exists in a crystalline form and has low solubility in common organic solvents. Chemically, it is highly reactive, particularly towards nucleophiles, and exhibits a unique coordination behavior with zinc and boron atoms.