Shares of several business-to-business e-commerce concerns hit the skids today, led downward by

Commerce One

(CMRC)

, as one of the company's potential new customers signed instead with a rival.

Commerce One lost $9.39, or 30.1%, to $21.69 in recent

Nasdaq

trading.

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On

Wednesday,

VerticalNet

(VERT)

said its technology would power Internet marketplace

Converge

, formerly known as

eHitex

, which is being set up by major technology companies such as

Hewlett-Packard

(HWP)

and

Compaq

(CPQ)

. VerticalNet said it would receive $107.5 million over three years for the deal. VerticalNet also sold its

NECX

computer chip exchange unit to Converge.

VerticalNet has lost 41 cents, or 7.6%, to $4.97. Fellow B2B

FreeMarkets

(FMKT)

skidded $3.94, or 17.9%, to $18.13.

Ariba

(ARBA)

lost $13.25, or 22.6%, to $46, while

PurchasePro

(PPRO)

fell $1.81, or 11.1%, to $14.50.