Page 430 - Carrahers_Polymer_Chemistry,_Eighth_Edition

Organometallic and Inorganic–Organic Polymers 393

though placement of the platinum moiety into various coordination platinum polymers. Some of
these polymers inhibit various cancer growths with much less toxic effects. Carraher and cowork-
ers also found that many of these are also very active antiviral agents and some are able to prevent
the onset of virally related juvenile diabetes in test animals. Recently, Carraher and Roner found
that cisplatin derivatives formed from reaction of tetrachloroplatinum II and methotrexate inhibited
a wide range of viruses in the nanograms/mL range. Similar results were found for the analogous
product formed from reaction with tilorone (11.29).

CH 3
O
O
N

CH 3 O
Cl (11.29)
Cl
Pt
N

CH 3
CH 3

11.5 ADDITION POLYMERS
Sulfur nitride polymers (polythiazyls) [–(–S=N–)–], which have optical and electrical properties
similar to those of metals, were first synthesized in 1910. These crystalline polymers, which are

superconducive at 0.25 K, may be produced at room temperature using the solid-state polymeriza-
tion of the dimer (S N ). A dark blue–black amorphous paramagnetic form of poly(sulfur nitride)
2
2
(Equation 11.30) is produced by quenching the gaseous tetramer in liquid nitrogen. The polymer is
produced on heating the tetramer to about 300 C.
o
+
S
N O R
N
S + S + R R S N
S + R N 4 (11.30)
N F
N +
S

Rather than the simple up-and-down alternating structure for polythiazyls (11.31), the actual
0
structure is more crankshaft like (11.32) caused by the uneven bond angles of SNS (120 ) and
0
NSN (103 ).
N N N N NH
+ + + + (11.31)
R S S S S R

R + + + R
N S S S
N N N +
+ S N (11.32)
+ + S N
S N S N

9/14/2010 3:41:42 PM
K10478.indb 393 9/14/2010 3:41:42 PM
K10478.indb 393