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Transition metals

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Transition metals Defined .. The transition elements are those d-block elements that form stable ions in which the d-set is only partially filled T.M. atoms lose ... – PowerPoint PPT presentation

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Title: Transition metals


1
  • Transition metals

2
Defined..
  • The transition elements are those d-block
    elements that form stable ions in which the d-set
    is only partially filled

3
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4
T.M. atoms lose electrons from 4s when they are
ionised
  • Cu Ar 3d104s1. but
    Cu2 ion is Ar3d9
  • Mn Ar 3d54s2 . but
    Mn2 ion is Ar3d5

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6
You either like it or love it but either way it
contains lots of B12and therefore Cobalt
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  • ? absorbed versus colour observed400nm Violet
    absorbed, Green-yellow observed (? 560nm)450nm
    Blue absorbed, Yellow observed (? 600nm)490nm
    Blue-green absorbed, Red observed (? 620nm)570nm
    Yellow-green absorbed, Violet observed (?
    410nm)580nm Yellow absorbed, Dark blue observed
    (? 430nm)600nm Orange absorbed, Blue observed (?
    450nm)650nm Red absorbed, Green observed (?
    520nm)

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This is the hexaaquocopper(II) ionwhich is blue.
13
..because it absorbs the red end of the spectrum.
14
The Statue of Liberty is made of copperhence the
green patina
15
This ion is green..and produced by treating the
hexaaquo ion with conc. Hydrochloric acid.this
is a ligand exchange reaction
16
The next few slides show reactions with ammonia
deprotonation first then the slower ligand
exchange reaction
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