Chpt 23: Organometallic compounds of s- and p- block elements

Hapticity

# of atoms of a ligand attached to a metal atom

Magnesium

Alkyl and aryl ________ halides are known for their use in synthetic organic chemistry

Trigonal pyramidal

All R3E compounds have what kind of geometry?

Monomeric; hydrocarbon

Cp2Be and Cp2Mg are ________ and are soluble in ________ solvents

Polymeric; ethers; hydrocarbons

Cp2Ca , Cp2Sr and Cp2Ba are ________ and are insoluble in _______ and _______

Pyrophoric

A material that burns spontaneously when exposed to air

Nuclearity

Addition of chelating ligands such as TMEDA can facilitate solubilization of lithium aggregates and also decrease _______.

Transmetallation

Aluminum alkyls (AlR3) can be prepared by the ______________ reactions or grignard reactions

Metallocene

Complexes of the type n^5Cp are called ________

Organometallic

Compounds containing Group1 or Group 2 metal-carbon bonds are readily classified as being ____________________.

Oxidation

Compounds of the type R3E are sensitive to __________ but resist attack by water.

Polymeric

Description of a material comprising of long-chain molecules, such as rubber, which may show large strains

Alkali Metal

Group 1: _________________ Organometallics

Alkyls; Aryls

Lithium _______ and ______ differ from the heavier Group 1 derivatives by being: • More stable thermally • Soluble in hydrocarbons and other non-polar organic solvents • They are liquid or low-melting point solids.

Oligoremic

Lithium alkyls are __________ both in solution and in the solid state

Terminal alkynes

Organic compounds such as __________ ________ (RC≡CH) which contain relatively acidic hydrogen atoms form salts with the alkali metals

Low

The E-C bonds are generally _____ in polarity

acids

The planar 3- coordinate B can act as Lewis _____ toward amines and carbanions.

p

The trend from metallic to non-metallic character limits the number of organometallic compounds in the ___-block

Trialkyl boranes

______ ______ are monomeric

Triaryl

________ compounds are less reactive

Radical anion

an intermediate that has both a negative charge and an unpaired electron

Organometallic compound

contains one or more metal-carbon bonds

Hapticity

number of atoms in a ligand which directly interact with a metal center

Sandwich Complex

the metal centers lie between two p-bonded hydrocarbon (or derivative) ligands.

Less

• In contrast to the Group 13 organometallic compounds, the group 14 elements are _____ susceptible to nucleophilic attack.

Tetravalent

• In most compounds, the group 14 element is ________.

Decreases

• Their stability towards all reagents _______ from Si to Pb