A series of lanthanide monoborohydride complexes stabilized by a bulky β-diketiminato ligand were synthesized, and their catalytic behaviors for the ring-opening polymerization of lactide were explored. Reaction of LnCl₃ with two equivalents of NaL^2-tBu (L^2-tBu = {(2-^tBuC₆H₄)NC(Me)}₂CH⁻) afforded the bis(β-diketiminato) lanthanide monochlorides (L^2-tBu)₂LnCl (Ln = Y (1), Sm (2), Nd (3), La (4)), which can be used as starting materials to prepare bis(β-diketiminato) lanthanide derivatives. Treatment of the chlorides with NaBH₄ produced the monoborohydride complexes (L^2-tBu)₂LnBH₄ (Ln = Y (5), Sm (6), Nd (7), La (8)). The solid-state structures of lanthanide complexes 1–8 were determined by single-crystal X-ray diffraction. Complexes 5–8 were found efficient in initiating the ring-opening of l-lactide and rac-lactide to afford α,ω-telechelic polylactide diols.

合成了一系列由庞大的β-二酮亚胺基配体稳定的镧系单硼氢化物配合物，并探讨了其对丙交酯开环聚合的催化行为。LnCl的反应₃与NAL两个当量^{2- TBU}（L ^2-TBU  = {（2-^吨BUC ₆ ħ ₄）NC（ME）} ₂ CH ^- ），得到双（β-二酮亚胺基）镧系元素单氯化物（L ^{2 -tBu}）₂ LnCl（Ln =  Y（1），Sm（2），Nd（3），La（4）），可用作制备双（β-二酮基氨基）镧系元素衍生物的原料。用NaBH ₄处理氯化物产生了单硼氢化物配合物（L ^2-tBu）₂ LnBH ₄（Ln =  Y（5），Sm（6），Nd（7），La（8）。镧系元素配合物1 – 8的固态结构通过单晶X射线衍射确定。络合物5 - 8被发现在引发的开环高效升丙交酯和rac-丙交酯，得到α，ω-远螯聚交酯二醇。