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pentamethylene
pentamethylene n.
Brit. 
/ˌpɛntəˈmɛθᵻliːn/
, /ˌpɛntəˈmɛθᵻliːn/U.S. /ˌpɛn(t)əˈmɛθəˌlin/
[with sense pentacyclic adj. (a) at sense 1 compare German Pentamethylen (1888 or earlier), French pentaméthylène (1886 or earlier in pentaméthylènediamine)] Chemistry (a) the cyclic hydrocarbon cyclopentane, C5H10 (now rare); (b) the divalent straight-chain radical —(CH2)5—, present in pentamethylenediamine./ˌpɛn(t)əˈmɛθəˌlin/ΘΚΠ
the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > cyclic hydrocarbons > others
heveëne1838
menthene1838
carotene1861
stilbene1868
mesityl1879
naphthene1884
tetramethylene1885
hexamethylene1887
pentamethylene1887
irene1894
pregnane1932
adamantane1933
aldrin1949
sterane1951
norbornane1952
the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > hydrocarbon radicals > bivalent radicals
ethylene1853
ethylidene1859
propylidene1876
pentamethylene1887
vinylidene1898
isopropylidene1900
1887 Jrnl. Chem. Soc. 51 241 This acid is the orthodicarboxylic acid of pentamethylene, corresponding with phthalic acid of the benzene series.
1909 C. A. Keane Mod. Org. Chem. v. 63 The simplest cyclic compounds containing four and five carbon atoms are the hydrocarbons tetramethylene, C4C8, and pentamethylene, C5H10.
1926 Industr. & Engin. Chem. 18 1176/1 The instability of this rubber was overcome..by addition of basic substances such as..piperidine pentamethylene dithiocarbamate.
1946 E. G. Rochow Introd. Chem. Silicones iii. 48 Those pentamethylene groups which are joined to two different silicon atoms from organosilicon polymers resembling those obtained with phenylene groups.
1951 I. L. Finar Org. Chem. I. xi. 203 Pentamethylene glycol (pentane-1:5-diol), CH2OH·(CH2)3·CH2OH,..can be obtained from pentamethylene bromide.
1992 Proc. National Acad. Sci. U.S.A. 89 768/2 Oligonucleotides linked at their 5′ end to 2-methoxy-6-chloro-9-aminoacridine through a pentamethylene linker were prepared as described.
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