Why BF3 do not exist as dimer?. Explain.

Baron trihalides do not undergo dimerisation, due to small size of boron atom which is unable to form bonds with more than three large halogen atoms. BX3 molecules are also stabilized by back bonding. 

 

Related Questions:

Why Ga has small size than Al exceptionally

Why aqueous solution of borax reacts with two moles of acids ?

What is structure of solid Ortho Boric acid ?

What is the structure of trimetaboric acid and trimetaborate ion?  

Why Borazine is more reactive than benzene towards Electrophic Aromatic substitution reactions ?

Why Borazine (B3N3H6) is also known as inorganic benzene ?.

Why B-F bond length in BF3 is shorter (130 pm) than B-F bond Iength in BF4- (143 pm)?. Explain.

Why B-F do not exist as dimer?. Explain.

Although anhydrous aluminium chloride is covalent but its aqueous solution is ionic in nature. Why?

Why Boric acid become strong acid in the presence of cis 1,2-diol or 1,3-diol ?

What are the hydrolysis products of urea ?

Urea is an organic diamide and is subjected  to hydrolysis by water, the solvent in urine. Water is the nucleophile in the substition and the result it can be visualized as carbonic acid and ammonia .The carbonic acid is unstable and decomposes to carbon dioxide.

Related Questions:

(1) Is all the C-C bond length in fullerene is equal ?

(2) Why CO2 is a gas, but SiO2 is a high melting solid?.

(3) CCl4 can not be hydrolysed but SiCl4 can be. Why?

(4) Why the C-C bond length in graphite is shorter than C-C bond length of diamond?

(5) How many six membered ( hexagons) and five membered (Pentagons) carbon ring present in (C60) fullerene ?.

(6) What are the SESQUI OXIDES ? give the examples.

(7) Arrange in increasing order of extent of hydrolysis [ CCI4, MgCI2, AICI3, PCl5, SiCI4].

(8) Although Sulphur contain vacant d-orbital but SF6 does not under go hydrolysis. Why ?

(9) CCl4 can not be hydrolysed but SiCl4 can be. Why?

(10) Silianol (SiH3OH) is more acidic than methanol (CH3OH) why?

(11) What happened when Graphite treated concentrated acids like HNO3/HF or KMnO4 ?.

(12) Why Boric acid become strong acid in the presence of cis 1,2-diol or 1,3-diol ?What is the molecular formula of Borax ?

(13) What is oil of vitriol ?