The dimesitylborylcarborane [1-BMes₂-2-Me-closo-1,2-C₂B₁₀H₁₀] (1) has been prepared. The Lewis acidity of 1 has been assessed by the Gutmann-Beckett method and found to be effectively identical to that of the previously reported 2-H and 2-Ph analogues. Similarly, the new catecholylborylcarboranes [1-Bcat-closo-1,2-C₂B₁₀H₁₁] (2) and [1-Bcat-2-Me-closo-1,2-C₂B₁₀H₁₀] (3), although more strongly Lewis acidic than the dimesitylborylcarboranes, were found to have Acceptor Numbers very close to that of the known 2-Ph analogue. [μ-2,2ʹ-BPh-(1-1ʹ-closo-1ʹ,2ʹ-C₂B₁₀H₁₀)-closo-1,2-C₂B₁₀H₁₀] (4), a compound with a boryl fragment attached to two carboranyl units [in the form of bis(ortho-carborane)] has been prepared and found to be highly Lewis acidic, reflecting the strongly electron-withdrawing property of C-bound carboranyl groups. The first example of a compound in which both Lewis acidic and Lewis basic substituents are appended to a single carborane cage, [1-Bcat-7-PPh₂-closo-1,7-C₂B₁₀H₁₀] (5), is reported. In 5 the Acceptor Number of the Bcat substituent is very close to those of 2 and 3 and the basicity of the PPh₂ substituent, assessed by measurement of the ¹J_PSe NMR coupling constant of the related selenide [1-Bcat-7-P(Se)Ph₂-closo-1,7-C₂B₁₀H₁₀] (5Se), is very close to that of [1-PPh₂-closo-1,7-C₂B₁₀H₁₁], suggesting that the properties of both substituents in 5 are effectively unaffected by the presence of the other.

所述dimesitylborylcarborane [1- BMES ₂ -2-ME-闭合碳-1,2--C ₂乙₁₀ ħ ₁₀ ]（1）已被制备。的路易斯酸性1已经由古特曼-贝克特方法评估，并发现是有效等同于先前报道的2-H和2-PH类似物。同样，新catecholylborylcarboranes [1- Bcat-闭合碳-1,2--C ₂乙₁₀ ħ ₁₁ ]（2）和[1- BCAT -2- ME-闭合碳-1,2--C ₂乙₁₀ ħ ₁₀ ]（3），尽管路易斯酸比二聚三氢苄基碳氢化合物更强酸性，但发现其受体数与已知的2-Ph类似物的受体数非常接近。[μ-2,2'- BPh-（1-1'-闭合碳-1'-，2'-C ₂乙₁₀ ħ ₁₀） -闭合碳-1,2--C ₂乙₁₀ ħ ₁₀ ]（4），具有氧硼化合物制备了连接到两个碳硼烷基单元上的片段[双（邻位-碳硼烷）形式]，发现该片段具有很高的路易斯酸性，反映了C的强吸电子特性结合的碳硼烷基团。其中两个路易斯酸性和路易斯碱性取代基被附加到一个单一的碳硼烷笼的化合物的第一个例子，[1- BCAT -7- PPH ₂ -闭合碳-1,7--C ₂乙₁₀ ħ ₁₀ ]（5），被报道。在5中，Bcat取代基的受体数与2和3的受体数非常接近，PPh ₂取代基的碱性通过测量相关硒化物[1-Bcat-7-P]的¹ J _PSe NMR偶联常数来评估。（SE）PH ₂ -闭合碳-1,7--C ₂乙₁₀ ħ ₁₀ ]（5SE），是非常接近的[1-PPH ₂ -闭合碳-1,7--C ₂乙₁₀ ħ ₁₁ ]，这表明在两个取代基的性质5是通过的存在有效地未受影响另一个。