Sunlight photolysis of the triplet state (S = 1) dititanium compound 1 induced its rearrangement to diamagnetic 2, which was a molecule containing two hydrogens less. The cage structure of 2 was determined by single crystal X-ray diffraction and was corroborated fully by ¹H and ¹³C NMR spectra that identified three simple bridging moieties — a hydrogen atom, a methine carbon and a methylene carbon. Its extremely short Ti−Ti distance 2.7537(7) Å causes a strong distortion of the bridging fulvalene ligand, which becomes η⁵- bonded to one Ti(IV) and connected by two σ-bonds from nearest carbon atoms of its other ring to the other Ti(IV) of 2. Other photolytical byproducts in very minor amounts were also isolated, which differed from 2 by the absence of one bridging moiety: compound 4 lacked the methine group and compound 5 had no bridging hydrogen. In the latter cases, the Ti−Ti distance fell in the range 3.2077(8) – 3.5543(12) Å and the fulvalene ligand was coordinated in the common µ-η⁵: η⁵-mode to both titanium atoms. The octamethylfulvalene ligands in 4 and 5 had their ring planes rotated mutually by about 40° in order to relieve the steric hindrance between their methyl groups. The thermally robust µ-oxo complex 3 obtained from reacting 2 with water showed a very similar structure.

三重态（S  = 1）二钛化合物1的阳光光解引起其重排为反磁性2，该反磁性2是分子少包含两个氢的分子。的笼形结构2通过单晶X-射线衍射确定，并且被充分证实¹ H和¹³ C NMR谱所识别三个简单的桥接部分： -氢原子，次甲基碳和亚甲基碳。其非常短的Ti-Ti系距离2.7537（7）使所述桥接富瓦烯配体的强失真，这变成η ⁵ -从它的另一个环的最近的碳原子键合到一个Ti-（IV）和由两个σ-键连接其他Ti（IV）为2。还分离出极少量的其他光解副产物，其与2的区别在于不存在一个桥接部分：化合物4缺少次甲基，化合物5没有桥接氢。在后者的情况下，使Ti-Ti系距离下降的范围内3.2077（8） - 3.5543（12）和富瓦烯配体中常见的μ-η协调⁵：η ⁵ -mode到两个钛原子。为了减轻其甲基之间的位阻，在4和5中的八甲基富瓦烯配体的环平面相互旋转约40°。由2反应制得的具有耐热性的µ-oxo配合物3 与水显示出非常相似的结构。