Abstract
Grown from ethyl acetate solution, the bis-ethylurethane of 5,7-dodecadiyn-1,12-diol is a monoclinic crystal, a = 16.9740(16), b = 4.9770(5), c = 11.0874(11) Å; β = 101.869(6)°; Z = 2; V = 916.63(16) Å3. The crystal structure contains two N─H…O hydrogen bonds per molecule and has nearly ideal parameters (d = 4.977 Å, ϕ = 45.8°, R = 3.477 Å) for solid-state polymerization.
Acknowledgements
We thank the National Science Foundation (Grants DMR-0504000 and CHE-0521047) for partial support of this research, and the Faculty Student Collaborative Research Program for partial support of Xiaoyu Wang during Summer 2005 and 2006.
Notes
a R = Σ | | F o | −| F c | |/Σ | F o |
b R w = [Σ w(| F o |2− | F c |2)2/Σ w(F o 2)2]1/2
c S = [Σ w(| F o |2−| F c |2)2/(n−p)]2.
a = (2−x, −y, −z)