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preface to fifteenth edition

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4.38 SECTION 4<br />

TABLE 4.9<br />

Bond Lengths between Carbon and Other Elements (Continued)<br />

Bond type<br />

Bond length, pm<br />

Carbon-oxygen (continued)<br />

In acyl halides: R9CO9X 117.1(4)<br />

Shorter bond in carboxylic acids and esters 123.3(5)<br />

In zwitterion forms 126(1)<br />

In O"C" 116.0(1)<br />

In isocyanates: RN"C"O 117(1)<br />

In conjugated systems, as in partial triple bond: O"C9C"C 121.5(5)<br />

In 1,4-quinones 115(2)<br />

In metal acetylace<strong>to</strong>nates 128(2)<br />

In calcite: CaCO 3 129(1)<br />

Carbon-selenium<br />

Single bond<br />

Paraffinic: 9C9Se9 198(2)<br />

In presence of fluorine, as in perfluorocompounds: 9CF9Se9 195(2)<br />

Double bond<br />

In Se"C", as SeCS and SeCO 170.9(3)<br />

In CSe radical 167<br />

Carbon-silicon<br />

Alkyl substituent: H 3 C9Si or H 2 C9Si 187.0(5)<br />

Aryl substituent: aryl9Si 184.3(5)<br />

Electronegative substituent: R9Si9X 185.4(5)<br />

Carbon-sulfur<br />

Single bond<br />

Paraffinic: 9C9S9 181.7(5)<br />

In presence of fluorine, as in perfluoro compounds: 9CF9S9 183.5(1)<br />

In heterocyclic systems: partial double bonds 171.8(5)<br />

Double bonds<br />

In S"C; thiophene, S"CR 2 171(1)<br />

In sulfoxides and sulfones 180(1)<br />

In presence of second carbon-carbon double bond: S"C9C"C9 155.5(1)<br />

<br />

In SC radical [in CS 2 , 155.4(5)]<br />

153.49(2)<br />

Bond type<br />

Bond<br />

length, pm<br />

Bond type<br />

Bond<br />

length, pm<br />

Other elements and carbon<br />

C-Al 224(4)<br />

C-As 198(1)<br />

C-B 156(1)<br />

C-Be 193<br />

C-Bi 230<br />

C-Co 183(2)<br />

C-Cr 192(4)<br />

C-Fe 184(2)<br />

C-Ge<br />

Alkyl 193(3)<br />

Aryl 194.5(5)

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