The title compound C_(28)H_(48)O_4 (M_r=448. 8) crystallizes in the triclinic, space group P1 with a=12. 909(5) , b=10. 422(4) , c=11. 052(4) A, α=108. 35 (3), β=100. 07(3), γ=70. 06(3)°, Z=2, V=1322. 9(8) A￣...The title compound C_(28)H_(48)O_4 (M_r=448. 8) crystallizes in the triclinic, space group P1 with a=12. 909(5) , b=10. 422(4) , c=11. 052(4) A, α=108. 35 (3), β=100. 07(3), γ=70. 06(3)°, Z=2, V=1322. 9(8) A￣3,109. D_c=1. 13 gcm￣(-3), F(000)=496, μ(MoKa)=0. 80cm￣(-1). The final R=0. 067 and R_w=0. 074 for 1652 observed independent reflections (I≥3σ(I)). The conformation of the molecule is rather unusual , and there is not any symmetry element involved in it.The four units are different from each other in bond lengths and bond angles. The distances between two separate oxygen atoms are 5. 77 and 4. 25 A, respectively , and those between two adjacent oxygen atoms average 3. 59 A.展开更多
文摘The title compound C_(28)H_(48)O_4 (M_r=448. 8) crystallizes in the triclinic, space group P1 with a=12. 909(5) , b=10. 422(4) , c=11. 052(4) A, α=108. 35 (3), β=100. 07(3), γ=70. 06(3)°, Z=2, V=1322. 9(8) A￣3,109. D_c=1. 13 gcm￣(-3), F(000)=496, μ(MoKa)=0. 80cm￣(-1). The final R=0. 067 and R_w=0. 074 for 1652 observed independent reflections (I≥3σ(I)). The conformation of the molecule is rather unusual , and there is not any symmetry element involved in it.The four units are different from each other in bond lengths and bond angles. The distances between two separate oxygen atoms are 5. 77 and 4. 25 A, respectively , and those between two adjacent oxygen atoms average 3. 59 A.
