Crystal Structure of 2,3,7-Tris(cyclohexylimino)-3,4-dihydro-4-spirocycloheptan-2H-furo[3,4-b]pyran-5(7H)-one

摘要

The title compound crystallized in triclinic space group P1 with cell parameters a = 6.6634(3)Å, b = 12.3296(6)Å c = 17.0338(8)Å, α = 86.394(1)°, β = 81.052(1)°, γ = 85.002(1)°, V = 1375.43(11)Å3, Z = 2, D_cal = 1.226 Mg/m3 at T = 100(2)K. The structure was refined by full-matrix least-squares procedures to find R₁ = 0.0480 and wR₂ = 0.1143 for 5663 reflections. All atoms in the furo-pyran ring are in a plane, except C₆. All three cyclohexyl rings of isocyanides adapt chair conformation, and their plane alignment is noncoplanar with respect to furo-pyran plane. The spiro cycloheptyl ring has a chair conformation.