The new [Al(LTol)Br2] (1) and the known [Al(LPh)Me2] (2) were prepared as potential precursors to more novel aluminium compounds. In the event, only the latter was effective. Thus 2 and two equivalents of potassium was the source of [Al(LPh)Me2K2(OEt2)}2] (3). The complexes [KSm(LPh)2}2] (4), [Sm2(LDph)3] (5) and [Sm(LTol,Ad)(LTol,AdâH)] (6) were obtained from SmI2 and two equivalents of the appropriate potassium β-diketiminate [LPh or LTol or LDph = N(SiMe3)C(Ar)}2CH, Ar = Ph or C6H4Me-4 or C6H4Ph-4; LTol,Ad = N(SiMe3)C(C6H4Me-4)C(H)C(Ad)NSiMe3, LTol,AdâH = N(SiMe3)C(C6H4Me-4)C(H)C(Ad)NSiMe2CH2, Ad = 1-adamantyl]. Crystalline complexes 3â6 were isolated in very low (4, 5) or satisfactory (3, 6) yield and characterised by X-ray diffraction. From comparisons of the MâN, NâC, CâC and CâCAr bond lengths with suitable standards, complexes 3â5 are assigned as containing Al3+/(LPh)3â for 3, Sm3+/(LPh)â/(LPh)3â for 4, and Sm3+}2/(LDph)â/(LDph)2â/(LDph)3â for 5. Complex 6 is best formulated as a Sm3+ compound with one ânormalâ (LTol,Ad)â and one deprotonated (LTol,AdâH)2â ligand.
新的[Al(LTol)Br2] (1) 和已知的[Al(LPh)Me2] (2) 被制备成更多新型铝化合物的潜在前体。结果,只有后者是有效的。因此,[Al(LPh)Me2K2(OEt2)}2] (3) 的来源是 2 和两个当量的
钾。[KSm(LPh)2}2](4)、[Sm2(LDph)3](5)和[Sm(LTol,Ad)(LTol,AdâH)](6)复合物是由
SmI2 和两当量的适当δ-二偏二
乙酸钾[LPh 或 LTol 或 LDph = N(SiMe3)C(Ar)}2CH, Ar = Ph 或 C6H4Me-4 或 C6H4Ph-4;LTol,Ad = N(SiMe3)C(C6H4Me-4)C(H)C(Ad)NSiMe3, LTol,AdâH = N(SiMe3)C(C6H4Me-4)C(H)C(Ad)NSiMe2CH2, Ad = 1-
金刚烷基]。晶体复合物 3â6 的分离率非常低(4、5)或令人满意(3、6),并通过 X 射线衍射进行了表征。根据 MâN、NâC、CâC 和 CâCAr 键长度与合适标准的比较,络合物 3â5 中的 3 含有 Al3+/(LPh)3â,4 含有 Sm3+/(LPh)â/(LPh)3â,5 含有 Sm3+}2/(LDph)â/(LDph)2â/(LDph)3â。络合物 6 最适合配制成 Sm3+ 化合物,其中有一个 "正常"(LTol,Ad)
配体和一个去质子化(LTol,AdâH)2â
配体。