Chemical New York Corp. stockholders approved its...

Chemical New York Corp. stockholders approved its previously announced takeover of troubled Texas Commerce Bancshares . . . Dallas-based Diamond Shamrock Corp. will change its name to Maxus Energy Corp. . . . Tandem Computers said its board approved a 2-for-1 stock split in the form of a stock dividend, payable June 12 to shareholders of record May 22 . . . Faced with heightened competition, pressure to keep costs down and a temporary void in its military business, Boeing Co. said it is unlikely to produce a profit increase this year to match last year’s.