† platoso-comb. form

Forms: before a vowel also platos-.

Origin: A borrowing from Latin, combined with English elements. Etymons: platinum n., Latin -ōsus , -o- connective.

Etymology: < plat- (in platinum n.) + classical Latin -ōsus -ous suffix + -o- connective. Compare later platinoso- comb. form.Attested in a small number of formations from the second half of the 19th cent., exemplified below.

Chemistry. Obsolete.

Forming names of chemical compounds, ions, etc., containing divalent platinum.

† platosopyridine n. Obsolete

ΚΠ

1857 W. A. Miller Elements Chem. III. 260 The two platinum bases from pyridine are:—Platinopyridine..Platosopyridine.

† platosamine n. Obsolete a hypothetical amide of divalent platinum, now known to be an ammine group occurring in platinum complexes.

ΚΠ

1856 W. A. Miller Elements Chem. II. 1066 Salts of Platosamine (Reiset's second base)..Hydrochlorate of platosamine (yellow) PtH₃N.Cl.

1865 C. B. Mansfield Theory of Salts 455 ‘Reiset's second Platinum base’..is supposed by Gerhardt to contain a body which he calls an alkali, ‘Platosamine’, NH₂Pt.

1900 Science 12 Oct. 547/2 Werner has considered as stereo-isomeric a number of metal-ammonias and their derivatives, notably the platinum compounds..platosemidiamine chloride and..platosamine chloride.

† platosammonium n. Obsolete a hypothetical ion consisting of an amide of divalent platinum, now known to be an ammine group occurring in platinum complexes.

ΚΠ

1851 Philos. Trans. (Royal Soc.) 141 397 I perfectly agree with those chemists who consider the salts of Reiset's second base as compounds of the Platammonium (Platosammonium).

1873 H. Watts Fownes's Man. Elem. Chem. (ed. 11) 349 Platinum dichloride..absorbs two molecules of ammonia, forming platosammonium chloride.

† platosodiammonium n. Obsolete a hypothetical ion consisting of a diamide of divalent platinum, now known to be an ammine group (in which there are two ammonia ligands) occurring in platinum compounds.

ΚΠ

1866–77 H. Watts Dict. Chem. IV. 678 Chloride of Platosodiammonium.

1868 H. Watts Fownes's Man. Elem. Chem. (ed. 10) 354 These tetrammonio-platinous compounds may also be regarded as salts of diammoplatosodiammonium.]

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2020).

单词	platoso-
释义	† platoso-comb. form Forms: before a vowel also platos-. Origin: A borrowing from Latin, combined with English elements. Etymons: platinum n., Latin -ōsus , -o- connective. Etymology: < plat- (in platinum n.) + classical Latin -ōsus -ous suffix + -o- connective. Compare later platinoso- comb. form.Attested in a small number of formations from the second half of the 19th cent., exemplified below. Chemistry. Obsolete. Forming names of chemical compounds, ions, etc., containing divalent platinum. 1. † platosopyridine n. Obsolete ΚΠ 1857 W. A. Miller Elements Chem. III. 260 The two platinum bases from pyridine are:—Platinopyridine..Platosopyridine. 2. † platosamine n. Obsolete a hypothetical amide of divalent platinum, now known to be an ammine group occurring in platinum complexes. ΚΠ 1856 W. A. Miller Elements Chem. II. 1066 Salts of Platosamine (Reiset's second base)..Hydrochlorate of platosamine (yellow) PtH₃N.Cl. 1865 C. B. Mansfield Theory of Salts 455 ‘Reiset's second Platinum base’..is supposed by Gerhardt to contain a body which he calls an alkali, ‘Platosamine’, NH₂Pt. 1900 Science 12 Oct. 547/2 Werner has considered as stereo-isomeric a number of metal-ammonias and their derivatives, notably the platinum compounds..platosemidiamine chloride and..platosamine chloride. † platosammonium n. Obsolete a hypothetical ion consisting of an amide of divalent platinum, now known to be an ammine group occurring in platinum complexes. ΚΠ 1851 Philos. Trans. (Royal Soc.) 141 397 I perfectly agree with those chemists who consider the salts of Reiset's second base as compounds of the Platammonium (Platosammonium). 1873 H. Watts Fownes's Man. Elem. Chem. (ed. 11) 349 Platinum dichloride..absorbs two molecules of ammonia, forming platosammonium chloride. † platosodiammonium n. Obsolete a hypothetical ion consisting of a diamide of divalent platinum, now known to be an ammine group (in which there are two ammonia ligands) occurring in platinum compounds. ΚΠ 1866–77 H. Watts Dict. Chem. IV. 678 Chloride of Platosodiammonium. 1868 H. Watts Fownes's Man. Elem. Chem. (ed. 10) 354 These tetrammonio-platinous compounds may also be regarded as salts of diammoplatosodiammonium.] This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2020). < comb. form1851
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