Animation for image inside the Button

I am new to this coding field, I think my issue is simple for experienced people like you all guys.I am trying to animate the image which is inside the button.When I click on the button I need the image to be rotated 360deg.I dont know what wrong I am doing here is my HTML and CSS code.Please help

.syncRotate {
  -webkit-transition: 500ms ease all !important;
  -moz-transition: 500ms ease all !important;
  -o-transition: 500ms ease all !important;
  transition: 500ms ease all !important;
  -webkit-transform: rotate(360deg) !important;
}

<button class="iconBtn" mdTooltipPosition="above" mdTooltip="Sync User" (click)="sync()">
    <img class="syncRotate" style="width:20px;background-color: #a6a6a6;border-radius: 13px;padding:2px;" src="../../assets/images/icons/sync.svg" alt="Sync">
</button>

Animation for image inside the Button

3 Answers