Definitions

• Transition metal complex– A ‘molecule’ with a transition metal at the centre

• Ligand– The molecule or ion that binds to the central metal in a complex

• Coordinate group– Another word for ligand, if the ligand is a molecule

Pt

NH3

Cl NH3

Cl

ligands

Coordinate groups

Transition metal (Pt)

NN

N N

M

Parts of the atom

Mass (A.M.U) Charge

Proton 1 +1

Neutron 1 0

Electron 1/1830 -1

• Add/subtract a proton: creates a different atom• Add/subtract a neutron: creates a different isotope• Add/subtract an electron: changes oxidation state / creates ion

Isotopes of hydrogen

• 3 forms of hydrogen:• Protium, deuterium, tritium

• Differ only in the number of neutrons they have• Adding another proton would make it helium

Diagram from Microsoft Encarta

at·om [áttəm]• (plural at·oms) n

• 1. smallest part of element: the smallest portion into which an element can be divided and still retain its properties, made up of a dense, positively charged nucleus surrounded by a system of electrons. Atoms usually do not divide in chemical reactions except for some removal, transfer, or the excha

nge of specific electrons.

• They are the single elements as they appear on the periodic table

• They are neutral (have no charge)

• mol·e·cule [móllə kyl]

• (plural mol·e·cules) n • 1. CHEMISTRY smallest part of a chemical compound: the smallest physical unit

of a substance that can exist independently, consisting of one or more atoms held together by chemical forces.

• Two or more atoms that are joined together by covalent or ionic bonding

H2N

CH C

CH2 OH

O

H2C

H2C

HN C

NH2

NHN

NHN

N

NH2

N

HH

H

Cl

Sn

Cl

Cl

Cl

Ion

• i·on [ ən, òn]• (plural i·ons) n • electrically charged atom or atom group: an atom or group

of atoms that has acquired an electric charge by losing or gaining one or more electrons

S

O

O

-O O-

Fe2+

NO3-

N H

H