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Red_Book_2005

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IR-2.5<br />

3.<br />

4.<br />

IR-2.4 SOLIDUS<br />

Me 2 N<br />

Cl<br />

Pt<br />

Et 3 P<br />

PEt 3<br />

Pt<br />

Cl<br />

NMe 2<br />

[(Et 3 P)ClPt(Me 2 NCH 2 CHCHCH 2 NMe 2 )PtCl(PEt 3 )]<br />

Ph 2 P<br />

H<br />

C<br />

PPh 2<br />

(OC) 3 Fe FeH(CO) 3<br />

[(OC) 3 Fe( μ -Ph 2 PCHPPh 2 )FeH(CO) 3 ]<br />

The solidus (/) is used in names of formal addition compounds to separate the arabic<br />

numerals which indicate the proportions of individual constituents in the compound.<br />

Examples:<br />

1. BF3 ·2H2 O boron trifluoride—water (1/2)<br />

2. BiCl 3 ·3PCl 5<br />

bismuth trichloride—phosphorus pentachloride (1/3)<br />

IR-2.5 DOTS,COLONS, COMMASAND SEMICOLONS<br />

IR-2.5.1 Dots<br />

Dots are used in formulae in various positions.<br />

(a) As right superscripts they indicate unpaired electrons in radicals (see Section<br />

IR-4.6.2).<br />

Examples:<br />

1. HO *<br />

2 *<br />

2. O 2<br />

(b) As right superscripts in the Kröger–Vink notation of solid-state chemistry, they indicate<br />

the unit of positive effective charge (see Section IR-11.4.4).<br />

Example:<br />

3. Li x Li; 1 2 x Mg *<br />

Li; x V 0 Li,x Cl x Cl<br />

GRAMMAR<br />

27

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