385(7)° and Z = 4. Both molecules have very similar bond lengths and angles pattern, even after the hydantoin ring opening. The 9H-fluorene moiety is nearly planar with rms of 0.007 and 0.032 Å for 2 and 3. The angle between the mean planes of the 9H-fluorene and the hydantoin or carbamide moieties is 86.92(4)° and 71.07(4)° respectively. In both structures N–H···O hydrogen bonds connect molecules into the
螺(
芴-9,4'-
咪唑烷)-2',5'-二酮的碱
水解, 2 导致开环生成 (9H-
芴-9-基)
脲, 3. 晶体结构 2 和 3 具有被确定。化合物 2 在正交空间群 P212121 中结晶,a = 7.2596(9) Å, b = 9.4497(14) Å, c = 17.304(3) Å 和 Z = 4 而化合物 3 在单斜空间群 P21/c 中结晶a = 4.6171(3) Å, b = 14.4713(9) Å, c = 16.9762(14) Å, β = 95.385(7)° 和 Z = 4。即使在海因环开口。9H-
芴部分几乎是平面的,2 和 3 的均方根值分别为 0.007 和 0.032 Å。9H-
芴与乙内酰
脲或
尿素部分的平均平面之间的角度分别为 86.92(4)° 和 71.07(4)° . 在这两种结构中,N-H···O 氢键将分子连接成沿 a 的链。将 2 和 3 的