pallad-comb. form

Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Some degree of stress is usually maintained on the first syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. palladammonium Brit.

/ˌpalədəˈməʊnɪəm/, U.S.

/ˌpælədəˈmoʊniəm/.

Origin: A borrowing from German. Etymon: German Pallad-.

Etymology: < German Pallad-, as an element in the names of chemical compounds (as Palladamin : H. Müller 1853, in Ann. der Chem. u. Pharm. 86 341), shortened < Palladium (see palladium n.²).Found only in a small number of formations exemplified below.

Chemistry. Now historical and rare.

Forming the names of certain (chiefly nitrogenous) compounds of palladium, as palladamine, palladammonium, palladdiamine.

ΚΠ

1853 tr. H. Müller in Chem. Gaz. 11 242 Palladamine is produced when a solution of chloride, bromide or fluoride of palladium..is precipitated with ammonia.

1853 tr. H. Müller in Chem. Gaz. 11 264 Palladdiamine is always produced when a salt of palladium or of palladamine is treated with an excess of ammonia.

1856 H. B. Jones & A. W. Hoffman Fownes's Man. Elem. Chem. (ed. 6) 373 Palladamine, NPdH₃.O, may be obtained from the chloride by oxide of silver... Müller also obtained another compound..to which he gives the name of palladdiamine; it contains N₂PdH₆.

1866–77 H. Watts Dict. Chem. IV. 329 Hugo Müller regards..the yellow [compound] as chloride of palladammonium, N₂H₆Pd″.Cl₂. The yellow compound..yields the oxide of palladammonium, or palladamine, N₂H₆Pd″O.

1907 Jrnl. Amer. Chem. Soc. 29 467 This metal was precipitated from a solution of palladammonium chloride, Pd(NH₃Cl)₂.

1919 Proc. Royal Soc. 47 p. xiii Kane produced a number of interesting bodies by the action of ammonia on the salts of palladium, which doubtless included derivatives of the bases palladamine and palladiamine [sic], subsequently recognized by Dr. Hugo Müller.

1929 Science 31 May 561/2 Kemmerer heated palladammonium chloride in an atmosphere of hydrogen and weighed the residual metallic palladium.

This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022).

单词	pallad-
释义	pallad-comb. form Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Some degree of stress is usually maintained on the first syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. palladammonium Brit. /ˌpalədəˈməʊnɪəm/, U.S. /ˌpælədəˈmoʊniəm/. Origin: A borrowing from German. Etymon: German Pallad-. Etymology: < German Pallad-, as an element in the names of chemical compounds (as Palladamin : H. Müller 1853, in Ann. der Chem. u. Pharm. 86 341), shortened < Palladium (see palladium n.²).Found only in a small number of formations exemplified below. Chemistry. Now historical and rare. Forming the names of certain (chiefly nitrogenous) compounds of palladium, as palladamine, palladammonium, palladdiamine. ΚΠ 1853 tr. H. Müller in Chem. Gaz. 11 242 Palladamine is produced when a solution of chloride, bromide or fluoride of palladium..is precipitated with ammonia. 1853 tr. H. Müller in Chem. Gaz. 11 264 Palladdiamine is always produced when a salt of palladium or of palladamine is treated with an excess of ammonia. 1856 H. B. Jones & A. W. Hoffman Fownes's Man. Elem. Chem. (ed. 6) 373 Palladamine, NPdH₃.O, may be obtained from the chloride by oxide of silver... Müller also obtained another compound..to which he gives the name of palladdiamine; it contains N₂PdH₆. 1866–77 H. Watts Dict. Chem. IV. 329 Hugo Müller regards..the yellow [compound] as chloride of palladammonium, N₂H₆Pd″.Cl₂. The yellow compound..yields the oxide of palladammonium, or palladamine, N₂H₆Pd″O. 1907 Jrnl. Amer. Chem. Soc. 29 467 This metal was precipitated from a solution of palladammonium chloride, Pd(NH₃Cl)₂. 1919 Proc. Royal Soc. 47 p. xiii Kane produced a number of interesting bodies by the action of ammonia on the salts of palladium, which doubtless included derivatives of the bases palladamine and palladiamine [sic], subsequently recognized by Dr. Hugo Müller. 1929 Science 31 May 561/2 Kemmerer heated palladammonium chloride in an atmosphere of hydrogen and weighed the residual metallic palladium. This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022). < comb. form1853
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