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By treating disodium（thiophenedirnethylene）dicyclopentadienide C

4

H

2

S（CH

2

C

5

H

4

Na）

2

with two equivalent of CpTiCl

3

or CpZrCl

3

DME at 0℃ in THF

two new thiophenedimethylene bridged binuclear metallocenes [Cl

2

MC

5

H

5

][C

5

H

4

CH

2

C

4

H

2

SCH

2

C

5

H

4

][C

5

H

5

MCl

2

]（M=Ti 3

M=Zr 4）were synthesized in high yield and their structures were characterized by

1

H-NMR.These complexes were used as catalysts for ethylene polymerization in the presence of methylaluminoxane（MAO）.The effects of polymerization temperature

time

concentration of catalyst

molar ratio of MAO/Cat on polymerization were studied in detail.The catalytic activities of thiophenedimethylene bridged binuclear metallocene catalysts（3

4）reached 2.44×10

5

g PE mol

-1

·cat

-1

·h

-1

9.61×10

5

g PE mol

-1

·cat

-1

·h

-1

respectively

which are higher than that of pheneyldimethylene bridged binuclear metallocene catalysts and much higher than that of corresponding mononuclear metallocenes（Cp

2

TiCl

2

and Cp

2

ZrCl

2

）.The molecular weight distribution curves of polyethylenes produced by binuclear metallocene catalysts（3

4）and by mononuclear metallocene catalyst have only single peak

but the former（MWD=3.5-4.7）is obviously broader than the latter（MWD=2.0-2.2）.