In B 2 H 7 (5 11), each B atom is approximately tetrahedral (a) How many valence electrons are present in the anion (b) Assume that each B atom is sp 3 hybridized After localization of the three terminal BH bonds per B, what B centred orbital remains for use in the bridging interaction (c) Followin...

a To find the number of valence electrons in the B2H7 anion we need to consider the valence electrons of each atom involved Boron B is in Group 3 of the periodic table so it has 3 valence electrons Hydrogen H is in Group 1 so it has 1 valence electron ...

In [B 2 H 7 ] (5.11), each B atom is approximately tetrahedral. (a) How many valence

Question:

In [B₂H₇]‾ (5.11), each B atom is approximately tetrahedral.

(a) How many valence electrons are present in the anion?

(b) Assume that each B atom is sp³ hybridized. After localization of the three terminal B—H bonds per B, what B-centred orbital remains for use in the bridging interaction?

(c) Following from your answer to part (b), construct an approximate orbital diagram to show the formation of [B₂H₇]‾ from two BH₃ units and H‾. What does this approach tell you about the nature of the B—H—B bridge?