(2) Preparation: a.质子置换法: Mnb+ 3H+=1/2B,H+ Mn3+ b.氢化法: BCR2 +3H =1/2B,He 3HCI C氢负离子置换法: 3LiAIH4 4BF3-ether 2B2 H6 3LiF 3AlF3 3NabH+ 4BFa ether 2B,Hs+ 3NaBF(2) Preparation: a. 质子置换法: MnB + 3H+ = 1/2B2H6 + Mn3+ b. 氢化法: BCl3 + 3H2 = 1/2B2H6 + 3HCl c. 氢负离子置换法: 3LiAlH4 + 4BF3 2B2H6 + 3LiF + 3AlF3 3NaBH4 + 4BF3 2B2H6 + 3NaBF4 ⎯ether ⎯⎯→ ⎯ether ⎯⎯→